I think you are correct that having banks and other such tenants is not going to enhance its appeal as an entertainment destination. I suspect the problem is with the state of things particularly over the last year, they probably found it very difficult to get such tenants, so they took the tenant they could get here.
I deal with Scotiabank and personally think they should have stayed on Jasper Avenue. The building they had there, while older, was quite sufficient and actually fairly nice. However, for whatever reason they decided this would be a smart move for them and Katz will have now a good paying tenant rather than having to carry an additional empty space, possibly for some considerable period of time.
Also, I suppose if it is any consolation, this is the other side of the building that faces towards the business district downtown and not the plaza or the arena.