I think the spawn rates are fine. majority our clan are full dl, many have weapons also. to increase spawn rate would mean whole clan full dl, weapon and offhand within a few months. now wheres the fun in that?
All due respect, you are on a world with no (or minimal) competition, and are in a small clan yourself. 2 equal clans on 1 world competing doubles that time, if the clans are larger (as I am lead to believe Morrigan is quite a small world), it could triple that time. The difficulty should be taking the bosses, not getting them to spawn, and getting the right colour to drop.. It actually feels like more of an achievement getting Snorri to spawn that it does downing him these days.
In terms of crowns, IMO they are far too rare, and for the effort it takes to get the weapons, they really do not live up to the expectation.
Also, a 5* PH cannot drop an item of it's own tier (for example, High Priest can't drop an Urn, can only drop Egg or Gem). This is the same for all of them which seems silly, they should have about a 20% chance to drop an item of their tier.