You will likely be feeding for quite a while with a new nuc drawing comb But if there is a good flow on they may quit taking syrup and then will fill the underneath of the feeder with comb. Any space the bees cannot police may be infested with ants. Hopefully we will not get hive beetles but in an area where they were an issue this setup would not be good. Are you still planning to house hives inside a building? Will you have top entrances? That can be a consideration with hive top feeding.
I have a bunch of the Mann Lake hive top feeders and for winter their wood surrounds (shallow hive body dimensions I think) serve as a quilt box and dry feed container.
I like plan for worst, hope for best and endup closer to the latter than the former. It does mean, however, being prepared to feed for a good part of the Summer ... or more.
In fact I am leaning heavily toward using top entrances. Official plan still calls for conventional bottom entrances because I do not see a compelling reason to deviate from that convention ... except, possibly, for overwintering nucs.
Hives will be indoors. To start, this will be, essentially, an overgrown garden shed.
Good point on the hive beetle aspect - we don't have them yet but should be tuned in to the probability of their arrival.