(nsfw) If your relationship became "unromantic" but better in other respects would you leave well enough alone?

for janbb

Hypothetically, imagine you’re in a relationship which is good sexually, but otherwise, problematic – you disagree, you fight, you sulk. Carnal is good, but the rest of it is meh.

Then you enter a period where for no identifiable reason, you stop having sex. Everything else seems to pick up, however. You observe both of you to be more even keeled, more thoughtful, more loving.

Could you leave it alone, and give up sex, or would you be compelled to fix a good thing?