Core 3+ should be classed as transports rule-wise for attack purposes- they did loads of RP, people like RHA should be forced to make reasonable demands first and roleplay with them when they didn't care about them before they got the high core.
The PoB changes made all bases stop shooting hostile targets unless attacked, they are much harder to upkeep - they shouldn't be combat ships in server rules, not the roleplay necessary Core 3 and higher for sure.
And I wouldn't put SCRA and RHA in one bag regarding the latest siege - RHA are perfectly in line with sieging, it's on staff that they allow pirates to siege without demands against bases that had to have lots of RP to exist as Core3+ it's on staff to make this obvious fix, RHA do what staff allowed them.