I really like your verision, most of all the legs, they look very compact and similar to the real version. On the feet you could have changed the middle toe, I think it looks to small. But otherwise than that I think it looks great! I have done one to and would really like if you taked a look.
I’ve seen a lot of AT-RTs and built a lot of AT-RTs myself (though that was a few years ago), so I’m always pleased to see a good rendition of the vehicle. Whether because of size or because of increased exposure in The Clone Wars, the AT-RT has become a vehicle that lots of builders attempt, but which very few can get right. Your version uses a lot of cheese slopes in the front armor, but you avoid making it look too blocky. That with the more squarish build of the legs and the slightly chunky feel of the model make it appear very CW-ish in style, and in this case I think that that’s a good thing.
Nicely done. The LEGO Designers needed to just make a set with a bunch of these than that gigantic behemoth of a thing. Great use of pieces, and the leg connection to the main structure is really creative.