I personally liked to get stuck here and finally find the solution, reminded me Super Metroid in Brinstar, I guess this is where you found the idea ;)
Yep, that's where the idea came from. ;)
To explain a bit further on why it was removed:
This is the place most people got stuck and there was not enough feedback in the running animation to indicate you gaining speed.
In fact, you were barely gaining speed, all that had to happen was you being at maximum speed when running over the bridge.
This was a bit too confusing and the bridge also felt a bit pointless / unnecessary.
There are probably more issues but at least you got some more information now. :)