A small increase I wouldn't mind, but when you start increasing stats every other level or something similar, it seems like the focus of the characters shifts to an emphasis on whether or not the Stat scores are high (good) enough, which often leads to the problem of min-maxing and then a dislike of anything negative.
Agreed. Suddenly it becomes a power grab.
As an alternate thought, I suppose one could allow for much more rapid stat advancement but change the bonuses so that you'd need much higher numbers to get the old bonuses. (Maybe 13-17 for +1, 18-22 for +2, 23-27 for +3.) Tunnels & Trolls does something like this, where stats become absurd in a hurry but it takes gigantic numbers to mean much.
Not sayin' I'd like it, but it would be an alternate approach for folks who liked gaudy stat numbers.
_________________Marv / FinarvynDCC Minister of Propaganda
; Deputized 6/8/11
DCC RPG playtester 2011, C&C
since 2003, ADRP
Since 1993, OD&D
player since 1975
"The worthy GM never purposely kills players' PCs, He presents opportunities for the rash and unthinking players to do that all on their own."
-- Gary Gygax
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-- Dave Arneson