Specifically, I did mention the last few years of TT's tenure. Those drafts and (lack of) FA signings eroded the depth massively. When Gute was hired, he had an immediate impact on the draft and FA signings (especially that first FA group).
Here are the 2015-2017 players that were on MLF's teams:
2015:
8 draft picks. Zero were with the team in 2019.
FA signings - only resigned GB players. Lost Davon House
2016:
7 draft picks.
Kenny Clark (6 seasons many starts) - multiple probowler
Kyler Fackrell (1 season, zero starts) - Mainly backup/special teams
Blake Martinez (1 season, 16 starts) - average starter.
Dean Lowrey (4 seasons, many starts) - average/below ave starter.
FA Signings - Jared Cook (never played with MLF)
2017:
10 draft picks
Kevin King (3 years, many starts) below average starting CB.
Montravius Adams (2 years, 3 starts) below average backup DT
Jamaal Williams (2 years, 5 starts) above average backup RB. Probowl dancer
Aaron Jones (5 years, many starts) excellent starting RB, single ProBowl
FA Signings - Martellus Bennett (boy was that one FUN!), Lance Kendricks, Jahari Evans, Justin McCray - House, Kendrick, and McCray played 2 years with GB. None played with MLF.
Three years of draft picks and acquisitions and TT helped MLF with Clark, Williams, Jones, and Martinez. The rest were negative or neutral impact as players.