We don't know what the guys in the war room know. All the guys paid money to predict where everyone gets drafted don't even know what's going on in those rooms. For every guy who lives up to his draft pick position, there is another guy who didn't. There are obviously can't miss prospects, but each GM, HC, OC and DC have their own lists of guys who fit their needs and wants. Maybe a guy like Hyppolite is something Dennis Allen wanted for a LB that can keep pace with a guy like Hockenson and LaPorta on passing downs, or chasing running QB's or RB's who catch a lot of passes.
Mocks can be fun to speculate where guys will get drafted, but at the end of the day, those mocks can be way off or right on the money, depending on how much research they do. Or it may not even matter how much research they do. It's possible that 3 or 4 of the UDFA's the Bears picked up after the draft end up being better than Hyppolite. Once you get past the first 3 or 4 rounds, it's a crapshoot if you are getting an NFL caliber player anyway. So is a pre-draft visit something to throw off other teams on your draft plans or just to rule out guys you might be interested in?
What's a bit fascinating is that they host a lot of players pre-draft, but not one of the guys they invited got drafted. They hosted Tyler Warren, but not Coleston. They hosted 6 WR's, but not Burden. They hosted 5 OLinemen, but none of the guys they drafted.
To me, Swift, Kmet, Edmunds and Thuney (if he doesn't get extended) is where the big savings for payroll happens next year. The draft protected all of those positions, except RB, unless the 7th rounder is legit. They can easily pick up a RB in next year's draft.
The Bears drafted guys that we didn't expect. I never saw a mock with Burden or Coleston, so I agree it was puzzling. But I'm certainly not going to pretend I know better what this team needed than Poles, Johnson and Allen.