Didn't get too far with it yet, but quick thoughts:
I felt the pads were a little too small. Teeny pads like this are ok on plated boards, because the solder just wants to slick onto those pads, but for home-etched stuff I find pads this size a little difficult to solder to.
C1, I think from memory, the input cap which sits below the leftmost opamp, doesn't have enough room. The 1uf box film caps I have are about .24" thick. I always allow this amount of space for non-polar caps that are bigger than about .33uf in value.
I personally don't object to the .3" size for resistors, and I prefer it for cramming more stuff in less space, but I did get some complaints about that on some of my boards. For me, it was necessary and I'll keep doing it in order to get big circuits in tiny boards, but I just thought I'd throw it out these in case it's not something you've thought about. It requires a little more attention to lead forming when populating the board.
Probably more comments to come...