Not trying to be that guy,
But I didn't you know needed permission from newschoolers to upgrade cameras these days. Is it wise for him upgrade? No not at all, but I dont see why there is so much hate. Its a funny way how this forum works these days. Some member high up on the scale cracks a joke about the kid, then it seems like out of no where everyone just hates on him. Even if they dont have edits to back up their shit talking, they act like their filming for level 1. If he wants to fucking upgrade, let him do it. He hasn't nearly reached the full potential of his t2i, but its his choice. Instead of everyone coming in here bashing him about it, give him a few recommendations.
To OP, it is not wise to upgrade at all. Look into getting some decent stabilization and some nice glass. In your edits, you only have still tripod shots. Get a nice tripod so you can do some pans and tilts. Look into upgrading from the kit lens as well.
If you really really wanna upgrade, sell your shit on ebay. It will sell quick, and you wont have to deal with the hate.