sorry to hear about the oil problem, I hope it is not something serious

Anyway, to respond to the original question, yes I do think that is too cool. You want a 180 thermo (if you're not running a thermo, get one in there) and you'd like to see the average temps actually hanging around there. Better oil performance, probably better fuel atomization, drivability, and everything. a cold engine will harm cylinder lubrication and foul the oil quickly

if you have too much radiator in the cold weather, consider blocking a large part of it off like they do with big rigs