The initial release about datacrons talked about underutilised squads.
The only way they can bring unused squads into play is if all relic requirements are removed.
I'm not going to relic 7 a character (and r5 their team) for the temporary use that datacrons give. But if there was no relic requirement and it made a team useful, that might be fun.
The Aayla datacron for example. R7 needed, and it looked fun to use/a pain to face. But I'm not going to put r7 on her for the 3 months that one lasted, or 4 months now. There are about 230 characters in the game. What are the chances that Aayla will cycle back into a datacron bonus? Seems very unlikely to me. 3 months later and those relic materials sure would have been nice elsewhere.
But with no relic requirements she could have shined brightly for a few months.
So one improvement would be remove requirements to use them.
But even then, I'd just prefer they were gone. I don't need another level of complexity in this game.