It's hardly a medium armour/bow issue.
If you're a caster in light, you dont get any nice bonuses from 8 traits sets either. Eyes of Mara is only usable for something like a Sorcerer healer, with magicka sustained problems (do they even exist?).
Best crafted sets in this game have 3-6 traits.
Way of the Arena have decent utility in PvP (until you get hit with an unbreakable CC combination...again). Spectre’s Eye isn't to bad if you stack avoidance. That's about it, if you want to wear gear with 8 traits.
The other sets are all pretty rubbish from my perspective. Maybe there's something in there for a PvE tank? But I doubt it. Really wish they improve the 8 set bonuses, considering how long it takes to unlock. There's currently no incentive going beyond 6 traits.