That's because the vast majority of us tend to make fall closure the issue and when spring comes, we just watch and enjoy. Well, not totally, but you get what I mean. It's not my belief you should ever 'drain the pond' unless the water is tainted and the fish are dying. If this isn't your case, why would you drain it? The only thing I do is get my pump and now, mech filter going again by plugging one in and replacing the filter material. I used to lift up my pots from the bottom but now just hang them lower than the ice thickness. The main reason you lift the pots is to have growth sooner, which in the case of lilies, is a good thing.
As the season warms and the WATER temp gets over 50, no problem feeding the fish. You can even do it sooner if you see activity and are diligent to fish out any left over food that they don't eat. Typically though, there should be algae and whatnot on the sides/bottom of the pond for them to keep them going during the transition. (one reason NOT to drain and replace). If you have a lot of debris (leaves, etc), that all should have been cleaned out in the fall, not the spring, so the bottom of your pond should be good to go already. It's not a problem to have some debris a the bottom but always better if you can avoid this. Hence threads re pond leaf netting in the fall. Since my pond is always screened in, I don't worry about this. And as mentioned before, the smaller the pond, the easier it is for parameters to get out of whack. I don't recall the specifics of yours; do you know the size? (gallons + dimensions LxWxD). If you have good water movement, this is a plus, especially in the spring.
If you turned your pumps and filter off, turn them on when you know ice won't be forming again. Last year, since February was so warm, I actually turned my pump on at the beginning of March. This year, I doubt the same will happen and am looking at probably the beginning of April or a bit later.
So, imo, there's no real agenda in the spring except starting my pump back up. That's it. If you have plants in your pond, you'll find they do a lot of filtering all on their own.
Hope this helps.
Michael