So he should get a 040 or 060, wouldn't that break compatibility also ?!
If u want to stay compatible to badly coded games then leave your 7.15909Mhz 68000 in the machine.
If u don't care about compatibility to crap coded games and you some extra speed then buy an accelerator card and you will get an actual noticeable speed boost.
If you want speed then you need faster ram which you get on an accelerator card.
If you want speed then you need L1 Cache which you get on an accelerator card.
if you want speed then you need a faster processor which you get on an accelerator card.
Playing games with a silly 14Mhz 010 which is a slow cpu with slow instructions and nonexistent fastram and nonexistent L1 cache won't achieve anything meaningful.
Move.L Dx,Dy and most other common fast instructions takes 4 cycles on the 68010. Ugh. It only takes 2 cycles on a slow crappy old ancient 1987 68030. That means a 14Mhz 68030 gets a double speedboost over a 68010.
Move.L Dx,Dy only takes 1 cycle on a 68040. (4x speedboost over 68010)
Move.L Dx,Dy can only take 0.5 cycles on a 68060. (8x speedboost over 68010)
There is no reason to break compatibility with old badly coded games by plugging in a 68010.