First, I agree you should take out K's for hitters. There's other value from hitting a ball into play versus K'ing (you can get an RBI, a sac fly doesn't hurt your AVG, you can score or a Run or SB if you get onto base, etc.)
Second, I actually like having both AVG and OBP. Not making an out is about 1.8x more valuable than slugging (see, for example, here
). So "double-counting" AVG is actually statistically defensible since it's almost twice as important (at least via OBP), and definitely more of a bell-weather of a quality player than team-influenced stats such as Runs and RBIs.
I also don't mind including IP in your stats. Otherwise, it would be pretty reliever-friendly, too much so, IMO. Leaving in IP gives some extra incentive to use starters vs. relievers or set-up men but your 3 ratio stats should be enough to discourage streaming.
If you wanted to really rework your stats, what I like (and use) is a 6x6...
Hitters: AVG, OBP, HR, R+RBI-HR, SB-CS, and TB (Total Bases)
Pitchers: RAA (ERA but includes unearned runs), WHIP, K's, IP, Starter's Wins - Starter's Losses, and Saves + Holds - Blown Saves + Reliever's Wins - Reliever's Losses.
But if you just chopped off K's for hitters I think it would be fine.
0-3 to 4-3. Worst choke in the history of baseball. Enough said.