PoB-grinding is completely optional if repair rates are nerfed like this. Sure it is more effective, you wouldn't progress in your siege with less frequent or shorter attacks near as much as through grinding, but you still would, with fewer ships required than before. It seems that's something many in this thread either forgot, ignored, or just didn't understand.
And you seem to have forgotten, ignored, or just didn't understand that there was a race to destroy the other base so you could keep your own.
Which was more of a feature of this event specifically, not of the new PoB balance. Perhaps it hasn't been clarified yet, but this rebalance direction wasn't planned for siege races, PvP Death Penalty reduction to 30 minutes, or anything specific to this event. It was meant to improve the mechanics of any regular siege.
Surprise, a pivot away from the subject people were posting around.
But if you prefer to talk about non event sieges too... those will also become worse, not better:
With lower repair rates and higher hp, it will not only make sieges longer, it also opens the possibility to log in when no defenders are on, log off as soon as defenders come online, and log back on when defenders left. Of course you'll say you'll magically tune the numbers so everything is perfect, without giving numbers because those are only "for the important people", and we'll only see after another "test" that will be just as disastrous as this one.