It's hard to really fault Wlad. It wasn't like Jennings was trying to engage or throw punches in bunches. Jennings has natural athleticism and movement that Fury doesn't have. Throw in the fact he will likely annoy Wlad at the press conferences and I see him starting aggressively and finishing the job quickly.
Wlad has def aged, but it hasn't been overnight. Hes been like this for years now.... he pushes a lot of his punches these days and doesn't have the snap on them they used to. And since he doesn't have good fundamentals to fall back on, as his athleticism continues to leave his fights will get more and more competitive. I do expect to see him in good form in his next fight. You would think he will really do some studying from this fight and will be even more motivated to put in a good performance. To be honest I think he was a little embarrassed yesterday.
If he goes past 40 he's joined his brother as the only heavyweight champions to reign past 40.. Foreman although he won linear he was never really undisputed.