Yeah this.
I expect i will play this game for a long time. First of all as you mentioned it feels like a challenge to play this game. I worked a while to get very good slider settings adapted to me (so i can have challengin plays).
What i now have added to really ensure a long dynasty is this:
I pick a certain offensive and defensive scheme (in this case a power running with p-a combo's and 3-4 defense). Then i started my handpicked/recruited freshman QB and play for 3 (or 4 if he doesn't declare) years in this system.
After the 3rd or 4th season i will be going for a completely different scheme, both offensively and defense with a new QB. And preferably one i don't have much experience with (in my case option run). That will be a new learning process again i would say.