I am not the one revising history, as a matter of fact, those defences with any sort of offence would have worked well, the entire point of those defences was to avoid giving up the big play. where those defences sucked was their inability to provide pressure. people forget, Blache was a williams tree guy, but he wasnt as aggressive, where Gregg would dial up crazy exotic blitzes to get pressure without going unsound, Blache would simply depend on his front 4. Blach also changed some of williams base principles and the role of both DT's in blaches system was to eat blockers, where williams uses more of a 1 and 3 tech.
The offence we had was struggling to score 20 points against decent to average teams, the defence kept us in a lot of games, they just didnt make any big plays. Rogers was by far our best cover guy since champ, he just didnt get picks, and so people screamed for him to go, which was stupid. Hall gets picks but cant cover anyone , who would you rather have on someone elses number 1?
Blaches system with 2 simple tweaks would have been far superior to what we have had for 4 years this is indisputable. yes AH was a fat lump but when he played he was superior to anything we have now all you gotta do with guys like that is motivate them. Shannahan has failed at that miserably. against the bears in the first year of this debacle we ran almost all 4-3 looks with ah just getting up field, and not only did we catch a glimps of what could have been we saw what SHOULD have been, a defence that ran to the ball on the OPPONENTS side of the LOS, that got pressure with simple blitzes and stayed sound, we won easily.
then a week or two later we played Indy and lost, why? because it was obvious shanny didnt like the number of 4-3 looks so suddenly we ran some abortion of an "amoeba" defence with only 1 and sometimes 2 down linemen, nobody would get set and Indy (who ended up being one of the worst teams in the league that year) just stomped us.
right that that showed us, shanny doesnt care about this team, if he did we would have immediately gone back to more 4 fronts, instead we saw way more 3 and 5 fronts.
so while you are absolutely correct that the 4-3 needed tweaking to be more effective, it was worlds better than forcing a 3-4 and then watching for 4 years while we didnt find any 3-4 players other than carriker .