Soul,
Admire the heck out of you as a poster and Ram fan. Also realize your question to Leo wasn't directed to me, but I want to chime in regardless!
First, I love and share your optimism on the OL talent we have on board. Edwards, Corbett, Evans, Noteboom and company give us plenty of reason for optimism moving forward, particularly at the guard position. I also like your Pats analogy as drafting in rounds 3-6, grooming, and inserting is their mantra and one I would love to see us emulate. Keep in mind, however, they had one of the greatest OL coaches in history at the helm during their dynasty.
Second, I agree the unit played better overall later in the season. That said, I do think we need to keep in mind that adjustments were made that supported that improvement. By way of example, Evans received far more help on the edge than Hav did prior to his injury. I'm not sure an ideal Oline set-up should require schematic adjustments to compensate for subpar performance. I'm not faulting Evans at all in this example as he shouldn't have had to be asked to be in there given what we knew of him coming in (he needed developmental time that wasn't afforded to him). I'm simply pointing out that I am sure McVay and Co. don't want to have to do that type of thing moving forward (unless a particular player or scheme call for it, of course), nor are elite OL's required to do so game in and game out.
I don't want to speak for Leo, but I have to assume that for those of us (myself included) that were disappointed in the draft largely point to the lack of support the OL received. Particularly, center and/or OLT (even one to groom).
In any year that I can remember our offense being elite over the past 30 years, I feel like we always had a top 12-ish OL in the league. That we finished the year ranked 31st, did not add a single newcomer via FA or the draft, and aim to finish that high seems like we are asking for a minor miracle. Quite honestly, it would be epic.
Put another way, let's assume Whit and Blythe play as they have most recently at their respective positions and Hav returns to his 2018 form. How good are we asking for our two guards to play to vault us into the top 12-ish in the league as a unit? That's a heavy burden on some high-potential yet young and unproven players.
Finally, I would argue to get into the top 5-8 units in the league will be impossible with an average at-best center in Blythe and a LOT that is simply no longer elite. We bypassed on a number of very good centers and that is just too important of a position for what we do, in my opinion.
Like I shared with So Far, I hope like hell you and the Rams brass are right a second time (when the bullets fly). I just need to see it with my eyes before I am convinced.
Respectfully,
Mike