Just shooting from the hip here...
PERCEPTION - I like it. I was also concerned that the elimination cross class skill ranks combined with the merger of spot and listen would make everyone into super detectors. Granted, limited skill points are a partial control on that.
APPRAISE - I'm not sure I agree with throwing it into Observe, but I can't argue that it isn't lame. And I don't think many campaigns hinge on Appraise checks, so making it be "free" with observe is probably not worth disputing.
LINGUISTICS - I have my own languages sub -system that I like. So I agree here, but for slightly different reasons.
DISABLE DEVICE - I agree. A Feat to let that Dex 20 INT 8 Rogue do things "by touch" would be fine also.
RIDE and HANDLE ANIMAL - I'd keep those separate. (though a +2 to Ride for every 5 Handle Animal ranks would work for me)