Confession: I didn't finish the game. I did the first 10-15% of it. I played it in turn-based but it felt the game wasn't built around turn-based and was going really slow and clunky. I don't hate RTWP. I love it in Paradox games and would take RTWP grand strategy games over turn-based grand strategy any day of the week. But for some reason with the need to select each character to manage with different moves and statuses, --and if you ignore or miss one, bad things happen-- RTWP makes RPGs feel very micromanagement-y for me. I know a lot of people like the more detail-oriented style of strategy, but I've always been more of a big-picture kind of person who likes things in macro-chunks (except when I'm playing economy simulators. Then I LOVE micromanagement).
I might give Kingmaker another go before getting Wrath of the Righteous. How do the characters and writing stack up between the two? I vaguely remember finding some of the characters in Kingmaker very annoying (not all. Just like 1-3).
I completely understand. If you do decide to play WotR (or even Kingmaker again), I'll second what others have suggested: - play on an easier difficulty, so that you can just RtwP the normal and easier combats. - either download a mod for pre-buffs OR try to have no melee spellcasters (or 1 if they're your main).
In retrospect, a big problem I've had with both my Km and WotR playthroughs are magus/eldritch scoundrel types, and even Paladins somewhat. Melee casters that require mirror image/blur/etc+ in combat, have to deal with possibly provoking AoOs, have lots of varied options, and just generally require a lot more micromanagement.
Ranged casters can kind of just do whatever using auto-AI, and you can just swap to them briefly for big spells. Full martials also can just be left to go ham on the enemy, maybe occasionally toggling abilities on or off or choosing a next target. It's those in-betweens that made playing in RtwP a chore.
(I can't really answer your question on comparing the characters and writing - I don't really remember plus I didn't get thaaat far into WotR. Roughly comparable iirc.)