Honestly, I think the debate now is down to simple aesthetics. Some people just don't like our taste in older ships.
Of course... "older" is all relative... since most of the "older" ships have variants that are clearly new advanced versions. I think, if anything, that suggests that they have been refitted to handle the slots and capabilities of a tier 5 ship.
What I still find astounding is how many people try to argue for "uplifting" the old ships. That is, instead of a reskinning of ther T5 ships to look like the T4 or lower ships, they'd rather see tweaks to shields, weapons, etc. Are they missing the massive balancing debates and flames that will result from that?