Lol dude. There is no difference! Upgraded towers, have the same repair rate in 1.21 and in 1.22. Scout towers or a Scout tower in the process of being upgraded has a different repair rate though.
I told Grubby that the guard tower repair rate is not changed, but he seems to think it had also been nerfed because he said Shiek told him the guard tower repair rate has decreased.
Really.. I think some people have no idea that guard tower repair rates are still the same, even pro-gamers! Of course, in time they will realise it.
Patch really doesn't even hurt tower rushing all that much either :/. IMO they just need to make towers take 2-4 times as much damage from siege. Siege needs to be a better option to counter towers.
http://www.sk-gaming.com/video/19790-Tower_Repair_Rates_While_Upgrading as you can see here
Really.. I think some people have no idea that guard tower repair rates are still the same, even pro-gamers! Of course, in time they will realise it.