Does 17 players that had a stint in an NFL roster mean the team was all-time stacked?  My guess is no

So I took a look at 2017 Utah, one of their worst seasons in recent memory. The team finished 7-6 with a 3-6 conference record for a 5th place finish in the PAC 12 South. Definitely not a great season. Not absolutely terrible (they did win a bowl game at least...!) but not a season we'd call particularly memorable

And here's a list of players on that team that were signed to an NFL roster at some point (including those who only had a contract in the preseason, same as the BYU list)

1. Jordan Agavisa
2. Bradlee Anae
3. Cody Barton
4. Jackson Barton
5. Julian Blackmon
6. Marquise Bell
7. Terrell Burgess
8. Darren Carrington III
9. Kylie Fitts
10. Nick Ford
11. Leki Fotu
12. Matt Gay
13. Javelin Guidry
14. Chase Hansen 
15. Tyler Huntley
16. Jaylon Johnson
17. Devin Lloyd
18. Lowell Lotuleilei
19. Siaosi Mariner
20. Zack Moss
21. Samson Nacua
22. Josh Nurse
23. Darrin Paulo
24. John Penisini
25. Hauati Pututau
26. Mika Tafua
27. Bryan Thompson
28. Orlando Umana
29. Mitch Wishnowsky

And it may be more as I'm not as familiar with Utah to know which players may have been preseason UDFAs that were quickly cut.  

Bottom line, there's a LOT of players that get signed as UDFA, even if they don't really have long careers. And more than anything we need to get away from viewing one or two draft picks and 3 UDFAs as a sign of a stacked team. (multiply that by 4 years and you end up with 18 players eventually touching NFL rosters from any given year)