u/OneEntrepreneur4462

Hello, my first question here!
I have started an England campaign recently and I cannot understand how am I supposed to annex all my smaller vassals, especially those in whales and Ireland. I have already taken some vassals from France from HYW events and the borders are very gory in continental Europe also.
Last time I played eu5 was 6 months ago when the vassal swarm was still a thing, but now the annexation time for even a one province vassal is around 20 years at the beginning, so forming GB seems tedious by just diplo annexing.
Should I release them and no cb war them or what? Or are there special events where I can just annex them (that would be very good), like the one where you instantly integrate that location in the north?