Is this coat warm enough for winter?

It is a light layering piece, not a winter coat. The faux suede blocks wind better than cotton but has no insulation, so it works over a sweater in mild cold and needs a proper coat in freezing weather.

Can the belt be removed?

Yes. The tie belt is detachable, so you can wear the coat cinched for a defined waist or open and loose for a straighter trench look.

How does faux suede handle rain?

Poorly compared with cotton gabardine. The fabric is not waterproof and water can mark the matte surface, so wear it in dry weather or treat it with a suede protector.

What length is it on a shorter frame?

It is midi length, falling around mid-calf on most wearers. On shorter frames it lands closer to the lower calf, which still covers the hips.

How should I clean a faux suede coat?

Spot clean with a damp cloth and mild soap, then air dry away from direct heat. Most faux suede should not go in a washing machine or dryer, and pressing needs a low iron with a cloth between.