no, not really. occasionally the power pickup thingy would get detached from the overhead wires, but the driver had a big pole to hook them up again.

the trolleys were basically replacements for trams, which needed a lot of street furniture in the form of rails, points, etc. which caused problems for the increasing use of cars. but i always liked them (trolleys).

Not if you plan for double-deckers and put the lines higher up. And then single-deckers need a longer pickup pole.