Three things -

1) a +4 modifier, even if countered by a -4 modifier, is something extremely rare on a non-Dragonborn modified +0 LA base race. I believe that the DMG has some balancing rules for creating homebrew races, and which penalties are worth 'more' than others. Might help here.

2) Movement speed is usually in 10' increments. I'd choose either 20' or 30', not average the two; 20' seems more appropriate here.

3) Lizardfolk speak Draconic, not Lizardfolkish

No matter how awesome that might be.