DIRECT EXAMINATION EXPERT TESTIMONY! i've always valued roleplay more, but that's entirely group dependent. though it depends on the flarp system you're using; Troll Powered By The Apocalypse and other rules-light systems will be a more natural mechanical fit for an emphasis on roleplaying. but there's also something in my thinkpan that deeply appreciates engaging with a more complicated system (this tends to be something more indulged in with #tmtg but i digress, my current flarp group - a Troll Pathfinder 1.0 campaign - also only cares about combat so i get my fun where i can)
POINT OF ORDER! all this to say i don't think the two should be opposed but realistically every group will ultimately prioritize one or the other, in which case, lore