I suppose we could have taken an edge player instead of Simmons and that would have fixed the problem.... not. Bottom line is:
1. 1st round picks hit about 50% of the time (2nd round pick less) and far less than that for an elite guy.
2. There are other needs like LB, CB, OL, WR in the early rounds
3. go back to item 1.
So as important as edge rushers are you might only draft one in the first two rounds 20-25% of the time based on need and what is available. Then when you get one, like Dodd, you have a 50% chance or better they don't solve the problem. In fact your best bet is to get a Jayon Brown like talent at edge in the 4th or 5th round (luck?). We also haven't figured it out yet but even when signing FAs, with track records in the NFL, having them play to their value might be a 50% crap shoot (with injury figured in).
Thus, just saying we could have, should have done more to fix the problem is not seeing the whole picture and even if we did spend an extra pick or two over the last decade there we might miss out on a guy like Henry or something and have a hole at another position.