I share your view. On the one hand, DeRozan has inarguably upped his game this season, he's playing by far the best and most consistent ball of his career, being an excellent floor general, and just a main cog for this Spurs team. Having been on the Trade DeRozan At All Costs bandwagon, I can safely say now that the Spurs
will get worse if they lose him, and that given the internal growth and chemistry the team exhibits now, trading him away for anything other than a king's ransom is not something I'd look forward right now.
It's not the end of the world if he leaves in FA, and the Spurs have seen a lot of their young players take a step forward to the point that his production
could be replaced, maybe not entirely, but close enough, in a year or two. But also, vet leadership on the hand of a player who's as consistent as DeMar, who is a real distributor and doesn't ball-hog, instead letting the young players grow, isn't easy to come by - and especially hard for a small-market team like the Spurs. I'd go as far as to say that, between getting Collins in FA and losing DD, and retaining DD but not getting Collins at a Max price tag.... I'd rather keep DeMar at this point. Maybe some recency bias after Collins' awful play in that Hawks game
but it's still true.
So overall, I'm pretty neutral on the issue. Which, ironically, speaks volumes about how much better DeRozan has gotten on the Spurs, since I leant pretty heavily to one side before this season/the Bubble.