Also the touchscreen and liveview focusing will benefit your macro work.
Nice features, but imho not useful for macro. For non-handheld macro, you're much better of with manual focus & Magic Lantern's focus peaking (and stacking of course). The dof is so thin that tipping the touchscreen with your finger will hardly do the trick, and this is the one situation where speed doesn't matter so the faster lv focusing doesn't help much.
Sorry, where did the OP mention handheld macro shooting? I was under the impression that it would have been using a tripod. I'm sure the OP does at least some tripod work so in those cases the flippy up screen, wifi and touchscreen could all benefit him.
And the OP also mentioned he wanted a higher fps camera, for whatever reason. That was my reasoning behind a 70D. Otherwise yeah I think any crop sensor camera would work.
But then again, he lives in a humid or tropical environment and needs the weathersealing. A rebel isn't going to cut it. And after owning a 7D, trust me you do not wanna go back to a rebel!
OP could get a refurbished 7D but I don't know if thats an option.