With Greg Robinson, Rodger Saffold, Demetrius Rhaney, Travis Bond, Brandon Washington, Barrett Jones, and Steven Baker already on the roster, 4 -5 more OLinemen will actually get them up to 12 - 13 OLinemen in camp.
And sure, the talent level at most positions diminishes rapidly after round two in most drafts. But, solid non-LT (especially interior) Olinemen can typically be had later than most other positions. And I expect that to be the case this year especially since, this draft class (while weak with blue chippers), it's actually somewhat deep potentially solid Olinemen (Especially interior Olineman).
I have no interest in the team signing injury riddled veteran free agents to a long term contracts at ridiculous cap costs either. But, rather than exaggerate as if that's all that's currently available, I see that there are still some solid vet free agents available that shouldn't break the bank. And I don't let guys like Long, Joseph, and/or Wells (whose injuries didn't really start until he joined the team) make me forget success stories like Harvey Dahl, Todd Steussie, Andy McCollum, & Dave Wohlabaugh.
And again, one can't guarantee that the Olineman the team MIGHT be able to trade down and obtain is going to pan out any more than whom the team might select if they stand pat at #10. And I say might, as a reminder that it takes two to tango (make a deal) and oftentimes teams want to trade down but can't find any takers willing to provide them the compensation they require.
Does the Oline need serious attention?
Of course.
Will the other offensive players perform better with a better Oline?
Sure.
Do the Rams need an Oline of blue chippers to have success on offense?
No. All teams really need are 5 solid to above average starters on the same page and a 2-3 service backups. Gazooks, the so-called best Oline in the NFL in Dallas only has 3 of these so-called blue chippers. LG Ronald Leary & RT Doug Free are average AT BEST and most here would be searching for their replacements if they were Rams.
Will all be lost if Rams don't select an OLineman in round one?
I doubt it as he'd still be just one player and a rookie at that. Plus, I suspect that the team will sign 2-3 free agents and add a couple more Olinemen in the draft to the 7 guys already on the roster.