I'm not gonna vote because the options don't match what I'd pick, but will give my opinion, which is basically what some people have already said. Also, just to remind something Pandora already said in other threads (I know some of you came back recently), I've fixed the official BG modes (KvM, Tierra and Flavius) and made my own "Mini WoE FE" (similar to "Rush" in servers with eAmod emulator) script for heRO, they're currently on the test server waiting for a test session in heRO's environment (It has been already tested on my test server). I might make a "Mini WoE SE" soon as well, if the GM team, and players of course, want it.
1. Some MvP and Miniboss cards should be disabled: I would consider disabling mainly GTB, Ghostring and Deviling, possibly FBH as well. I personally would just block everything since it's easier, but taking into consideration that most cards have a downside or useless effects in WoE, it's best to discuss which cards are game-breaking and should be disabled and which shouldn't.
2. Ghostring Scrolls should either not be obtainable or disabled in WoE/BG: You can keep it as a MvP drop or something for people to use it in PvM, I don't see it as a problem out of WoE/BG. But having Unfrozen effect and Ghost property in an armor, in PvP/GvG environment, is just not right. I'm aware that it can be countered, but if we're talking about disabling the card, the scroll should obviously be disabled as well.
3. Exp in WoE is whatever, you can kill a mob of noobish monsters (5~10 High Orcs for example), or an Anubis or whatever, and gain more exp than in WoE. The main problem is that people leech War Points for goodies such as Buff (and Ghostring?) scrolls, etc. Now in BG I would either remove it or make it very very low. Low enough to not encourage players to join the event ONLY for exp.
4. The prices for BG gears should indeed be lowered: It's not in the list but has been mentioned and I agree that it should be done, for the lower-tier gears at least. Prices could be negotiated, maybe something like 100 points for non-Glorious Shoes/Garments and 200 points for non-Glorious Armors, just so it's not too easy, nor too hard (these are just examples, actual BGers could throw their opinion there).
5. WoE SE: It could be a great incentive, both for old and for new players. Inactive oldies might come back to try it and WoE guilds looking for a stable server may join as well. In this case, MvP and Miniboss cards don't even need to be disabled since it requires more teamwork and organization than ubber gears (actual WoE players feel free to tell me if I'm wrong). The mapflags are basically the same as WoE FE so that shouldn't be a problem, but the script probably has never been used on heRO, meaning it'd require some time for testing (a trial period, on which no guild keeps the castle in the end?) and whatnot. Once again I can offer a hand to fix and test things.