An interesting thread though I'm not inclined to get tied up in knots either way, given that it echoes the ongoing 5.56 vs 7.62 and M14 vs M16 debates that rage endlessly elsewhere.
I think of the current Norinco M14s and reasonably priced .308 semi autos that work fine for big game hunting (whether with a SOCOM or short rifle in the bush or standard rifle from a stand), Service Rifle matches and perhaps tinkering with to make a decent distant shooting piece for a bit farther than effective .223 ranges. And being non-restricted makes a huge difference, as so much of the fun with them revolves around being able to pack them into the woods. While one can tinker with these rifles ad nauseam, most do work fine out of the box in the hands of a reasonably competent shooter.
Barring a pleasant surprise, we won't be taking AR15s into the woods in the short term, and even the cheapest .223 semi-autos (SU16, T97 or Mini-14) begin at least a couple hundred dollars more expensive than the Norc M305, while the really nice rifles in .223 that utilize AR mags add at least another $1000 to that. While I'm pleased with the T97 that I've played with and would get one simply to have a handy .223 I can take into the bush, I'm not so sure that I'd choose it over an M14 if I were to go into combat. In any event, I'm pretty sure that properly trained soldiers who take care of their kit would be able function effectively with any of the main choices (M14, M16/M4, AK, T97 etc.) within the limitations and strengths that come with each rifle, though the lighter, shorter carbines would shine in house clearing or other really close range uses.
Though it doesn't play directly to judging the quality and effectiveness of the M14/M1A design, I cane across the following links that discuss the value of .308 rifles in a combat setting, which could be achieved using M14/M1A/M305 variants in different configurations for short and longer range work:
http://www.maxvelocitytactical.com/2015/03/the-citizen-unconventional-rifle-squad-arming-with-308/
http://www.maxvelocitytactical.com/cutt-citizen-unconventional-tactical-team/
http://www.maxvelocitytactical.com/2013/10/rhodesian-cover-shooting-the-drake-method/ or
http://smallwarsjournal.com/documents/rhodesian-cover-or-drake-shooting.pdf
As the last of the links above speaks of soldiers who primarily used the FN-FAL, it speaks more to the merits of the older, heavier rifle designs chambered in 7.62mm. This isn't to argue against the rifles that replaced them, but simply highlight some of the strengths of the older weapons. It's a pity that Canadian shooters don't have the opportunity to play with the FN and compare that with the M14 platform based upon real life experience. In any event I for one won't lose any more sleep over the OP's post than I would towards one saying that our Lee Enfields or Mosins were obsolete, or try to debate the point with references to articles about the Taliban using such weapons effectively, etc.