I found TW also a great enrichment to the game, but by recognizing the next one is only 24h away (i know they said so before) it became less fun. Every 2 weeks 2 TW - i find it too much. A good thing becomes routine, gets boring and finally evrybody is gonna groan. Let it be special, attractive, something to look forward to. In my point of view one per month would be fine. And stepping back ain't easy when you are in a guild and you won't let down the other members. As far as it go for raids, it is only me, but when it comes to a guild-event - everbody is needed.
BTW an auto-button to get through the whole gw with one click would be appreciated ;)