Wow. What on earth happened?
I worked in this building for over a year, most of 2012-part of 2013. I left when they were just finishing the new windows. They should have stopped there. That canopy is an absolute mess by the looks of things.
Regarding the sign, TD is phasing out the Waterhouse name. So they're probably going to replace it with some newer, possibly LED logo that just says TD as they are still the lead tenant by a longshot (as far as I know). There may be a small chance that they add the word "Wealth" beside the logo, but I doubt it.
Likely just keeping up with the new CIBC sign atop their building down the street at Yonge.