Being entirely honest. I think disabling third person whilst you have weapons out is a viable way to improve the s2k scene - at least until we have a way for third person to enabled only when you have your weapon drawn. Sure, it's not perfectly what everyone wants - it has to be a compromise either way. Not to mention, either way people can still do all their funky s2k strats with it, it's just slower and I don't think it's a big enough bother to RP to have it disabled with weapons out. Ideally, we can get it to the point where it's only disabled when your weapon is readied - admittedly, it'd still be used to peak in S2K but at least it doesn't ruin people's RP experience (like constant s2k).
Another option is just make third person abuse/peaking against the rules - sure, it's going to be difficult to staff it, but most the time there's staff on either side of the s2k anyway who can give their buddies a hint to stop doing it.
The third option is that admins just disable/enable the third person depending on S2K heavy environments/events. Think, they'd disable third person during a huge shootout (like in the IZ with the Combine base, or during the Agora raids, etc.) but leave it on for smaller engagements where Third Person Peaking/Abuse doesn't really matter cause the fights are short enough anyway. With this, your S2K Sweats can still do their funky ambushes and what not and your ERP Enthusiasts can have third person during their RP.
Otherwise, maybe we should just reconsider if our focus is meant to be on RP or S2K.