glass
(he, him)
4e had two entirely separate sets of off-turn actions: Opportunity actions which were once per turn and immediate actions which were once per round. Much as I loved 4e, that always seemed more complicated than necessary. But just having opportunity actions ougt to be fine INMSHO.Also, too much OA spamming slows down the game. Too many reactions and interrupt are often cited as why D&D 4e was such a problem.
I really liked it for Paladins and Mageblades. I preferred Essentials style defender auras for actual fighters, personally.i did like 4e style marking.
Unless I am severely misunderstanding the situation, the cannot reprint Sharpshooter (with or without modifications). So in a Level Up-only game, the you can do that. OTOH, as soon as you are using it alongside the PHB it come right back....This. Take away Sharpshooter and Archery fighting style and all of a sudden melee is right back on top as the dominant damage-dealing mode.
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glass.