Well, those guilds have rose to power. Tbh I'd rather see harder towers that you actually have to think and work together to take, so get together with your guild and start planning. There's allies for a reason. Get to know other guilds and maybe even have meetings on Skype or something. Think of strategies to take the tower and keep it rather than "go down" or "stay up". The towers all have a reasonable size that you could take advantage of if you set your mind to it. Instead of thinking of the new changes as barriers, think of the ways they are an advantage to you. And jump on those opportunities.

Slicing will only get you so far. You need a strategy.