I think you answered your own question with "Pack finished with consecutive 13 win seasons" and by doing so, they didn't see the need to go crazy in Free Agency or trades. Basically, they had a solid team and could concentrate on slight tweaks and drafting for the future and some for the present.
What they have now is a young team, that appears to be on a quick development path, created by a lot of young players, to being a very solid team. However, they lack in a few key starting positions, Safety, CB and possibly ILB. They shouldn't try and fill the holes in the secondary with rookies, no matter how high they are drafted.
The other thing going on is/was their cap situation. In 2021, 22, and 23, they were a team headed for cap-tastrophy. They saw it, knew they couldn't lock up any new money in high end free agents or starters obtained in trades. So they sat on their 13 win roster, grabbed some low end FA bargains, drafted for the future and got cap healthy.
So far, it looks like their plan took wings and is working. The team is young, developing and they are getting cap healthy. Time to spend some money and plug the holes with 1-2 high level starting Free agents.