I'm sure they'd like the experience but I can't imagine they'll lose much sleep over it. Pretty sure they'll be fine once they get their first check.
I still think the draft gets pushed back but that's just my opinion. I think most GMs and Scouts will push to get it moved back. Not being able to do in-person evaluations or physicals is going to be a big issue, especially for guys that weren't combine invites, didn't attend, or were unable to workout due to injury.
If they do have the draft as planned, it'll be interesting to look back in 3-5 and see if there's any difference in the effectiveness of selecting players at the top of the draft.
I'd imagine there will be some serious gems in the UDFA pool this year this most of these teams wouldn't have had the chance to attend pro days or hold individual workouts for some of the lesser known prospects. I would also suspect we see an abnormally high number of "Big 6" players go in this draft because of the circumstances.