Implememt some features similar to the old keep ranking

[navis]

There used to be a great feature for guilds to be involved with Keeps directly by claiming them, some of those features which were good were
deadbolt - modifies the ability to enter keeps (I'd suggest this only for rank 4 or 5)
extra NPCs patrollers who alert your guild of enemies nearby. This was a nice addition as it can give you lots of advanced notice of enemies - or false alerts, too. both good to have.
If you wanted to try other things you could consider modified oil, sieges, doors..
Some of the these features might be good for players regardless if there is a Guild commitment, by making some of these things a bit more dynamic...
I think there is a need to take a look at[item][/item] the guild involvement in RvR to see if more QoL features should be added for the players interested in being more involved with ranking a keep as an investment.