While many of these Pokemon deserve evolution, some of them should be handled with care, especially if they don't reduce stats, as speedier Pokemon like Rapidash and Zebstrika could become problematic if speed and offensive stats were buffed, and Chatter's confuse chance could be very frustrating were Chatot's stats were better. Maybe they could get more "sideways" evolutions that only change stat totals little, but change specialization?
For more normal evolution's, I'd like to see Durant get a queen ant evolution, but I don't know what Heatmor could get to balance it.