Cost/Benefit for Castle types

[RonD]

Here's a different angle on the Watchtower issue.

It seems that the devs thought about the costs and benefits of different castle types only (or at least largely) in terms of resource gathering + defense vs. gold cost + build time. But the MP community generally ignores those issues. The Watchtower is the favorite because it is the cheapest lategame defense against ghostriders.

How about re-balancing the design point costs? Make a "middle" castle the 0-point default, and charge design points for deviations either way.