I wish I was an expert! As far as I'm aware the hoses aren't shaped, in fact the one on the left as you look down is only short and almost straight. The other one has a gentle "S" bend but I doubt very much that it was shaped. The original top and bottom hoses seemed fine, no signs of cracking etc. I didn't think about the thermostat as they are pretty reliable, also it's an easy hose to remove should the need arise at a later date. The main thing is to fit everything to the new radiator before it goes back, unless the job is done with the bottom under tray ( I've forgotten the correct name for it) removed, in which case everything can be connected afterwards. Obviously if it is removed it makes it easy to catch any escaping TF but the amount lost really is very small, probably an egg cup full. Another small amount will be lost when the rad is removed but that can be plugged up first.
The hose I bought for the ATF pipes is fuel hose that says on it "suitable for unleaded fuel" I'm told this will be fine for ATF.