GeorgeV77

I have a Scott Hybrid for some time now and I'm looking in changing the stock iron crankset (shimano fc-191 28-38-48 square tapper) to some road compact (eg FSA Vero Compact double 34-50 square tapper). The reason is that I have never used the granny gear, plus I want to get some more top end. The crankset spins on a shimano bb-ty 30 68/122 square tapper bottom bracket. Rear hub is 135mm wide, chainstay length is 45cm, the cassette is 8-sp 11-32, the front mech is a shimano FD-C051 48T and the rear mech shimano RD-M 360.
Is it doable using the FD I allrady have? (by raising it on the seat tube and adjusting the limits)
Is the current bb sufficient for cranks-chainstays clearance?
Will the RD be sufficient for the increased capacity?
Is there anything I'm ignoring in the whole concept?

Any help will be welcome..

edit: Crank arm length 175mm