I think the current star classification needs an overhaul.
In my version Y class stars would be A class, T stars would be B class, L stars would be C class, M stars would be D class, K stars would be E class, G stars would be F stars, A stars would be G stars, B stars would be H stars, O stars would be I stars, Wolf rayet stars would be J stars, Supergiants, Hypergiants, and sub classifications would be converted to this method. What do you think? Is this a better system?
I want this "inverse alphabetical order" so it is more efficient and simple for many to use, if you have someone that is a very amateur astronomer, and they are learning the current classification system, they will probably be a bit confused, so this "inverse alphabetical order" is a logical system.
OBAFGKM spectral classification it's the first thing they teach you regarding temperature differences and Hertzprung-Russell diagram, I don't see why they should be confused, exactly as when you learn the name of planets in order of distance from the Sun. It should be better in order to simplify astronomy for amateurs rename all planets: "One" for Mercury, "Two" for Venus, "Three" for Earth, and so on.
"Time is illusion. Lunchtime doubly so." Douglas N. Adams My mods Asus x555ub: cpu i5-6200u - ram 4gb - gpu nvidia geforce 940m 2gb vram
Well naming planets is not a part of this discussion as they are named after various gods and such and I don't have a problem with their names. That is irrelevant to this discussion.
Why did they decide on random letters instead of a nice simple orderly classification like I have shown? I mean they chose an illogical system that doesn't really seem to have an particular order, as logic means orderly and neat.
The order is given by previous classification methods of stars, effectively starting from A, B, C, etc. but as new data followed, those classes were moved before or after nearby letters, or brand new letters like O were used, which was the next free letter. This because moving letters around was more convenient than changing tons of accumulated and archived materials regarding stars spectra published since second half of 1800. You may find many interesting facts by studying history of science.
I applied your logic at planet names, a bit stretched but that's how logic must be tested. You should have problems with planet names.
"Time is illusion. Lunchtime doubly so." Douglas N. Adams My mods Asus x555ub: cpu i5-6200u - ram 4gb - gpu nvidia geforce 940m 2gb vram
If the order of the spectral classes were changed, this mnemonic could no longer be used to remember the order: 'Oh Be AFine Girl Kiss My Lips Tonight, Yennifer'.
So I'm definitely against it!
(The name Yennifer - for the Y class of brown dwarfs - I myself have added!)
It's much like how we define current as a flow of positive charge, even though the actual charge carriers in a metal conductor are electrons. Totally backwards. Thank the person who rubbed a glass rod with a piece of silk and defined its acquired charge to be positive.
Actually I get used to the current system so much that having an ordered classification wouldn't make it so much better. When I read "M" I know it's an red star, when I read "G" then it's yellow, and so on.
The only alternative would be having both classifications.
The universe is not required to be in perfect harmony with human ambition.
Indeed. Eventually as astronomers we don't even need to think of a mnemonic; we just know the letters and what they correspond to by regular use. Yellow stars do feel very "G" to me. And blue stars are so O and B. I can't imagine relearning everything. "Okay, yellow's are F now, which were white. And A are now G. G is now blue-white. Blue's are now I and H. But B's are brown dwarfs?" Uuuuuugh. Yeah, the system makes sense. But my pre-programed brain hates it.
Well we wouldn't have to do a quick and fast change, we could do a slower change where we wouldn't have to update anything before 1950's, we would change major sites and whatnot that use this classification and gradually change to it. Not that hard to do, we should have just used more efficient things instead and moved the letters so they are in the same order, instead of having to use an illogical system.
Eh, I honestly see no reason why one should make such a drastic change for such an extremely minor, almost negligible benefit. Not only would people struggle to adapt to the new system for a time, but you'd make 150 years worth of literature a lot more confusing than it needs to be.
In my eyes, it's kind of like changing a minute to be 10 seconds long and an hour 10 minutes long. Yes, it might be more "logical" and easier to remember, but it would cause A LOT of confusion.
ENG
New site
Pirate 
Italy 
Germany 
United States 
Hungary 
Eventually as astronomers we don't even need to think of a mnemonic; we just know the letters and what they correspond to by regular use. Yellow stars do feel very "G" to me. And blue stars are so O and B. I can't imagine relearning everything. "Okay, yellow's are F now, which were white. And A are now G. G is now blue-white. Blue's are now I and H. But B's are brown dwarfs?" Uuuuuugh. Yeah, the system makes sense. But my pre-programed brain hates it. 
Norway 
Croatia