Last year, the top 3 Packers inside linebackers played the following snaps:
- Blake Martinez: 982
- Jakes Ryan: 507
- Joe Thomas: 107
- Total: 1596
These 1596 snaps for the top 3 inside linebackers came in a season with about 1055 total defensive snaps. So that's about 151% of the total.
In Pettine's two seasons at the head of the Browns, his top 3 inside linebackers played the following snaps:
2014-
- Karlos Dansby: 814
- Christian Kirksey: 684
- Craig Robertson: 661
- Total: 2159
2015-
- Karlos Dansby: 1032
- Christian Kirksey: 568
- Craig Robertson: 382
- Total: 1982
In 2014, the Browns had a total of about 1160 snaps on defense, and 1051 in 2015. So that would be 186% and 188% respectively.
The point here is that Pettine has traditionally used true inside linebackers quite a bit more than Capers ever did, who was more inclined to use DB's in linebacker roles.
I think it's more likely that he moves Jones into a true safety role and looks for a starting inside linebacker with more athleticism and coverage skills than Martinez/Ryan possess. If they wanted to use the 14th pick on the position, that would be Roquan Smith.