We have a lot of islands and intersecting inlets/channels around here, some with steep shores, so rebounding confused seas are the norm. The semi-displacement hull with hard chines gives what I call a 'snap roll' where the deceleration acceleration phase happens really fast. Having said that, 15 knot winds are well within its grasp.
Our aft deck is a bit spongy from water leaks around the fuel fills, but we knew that going in...it'll get replaced when the original fuel tanks come out.
Our fore deck is solid, as are the side decks and pilothouse roof. There was some leakage around the mast step bolts...that might be where the window leaks originate from? Any hints of water where the saloon ceiling meets the walls above the windows, or back towards the sliding entry hatch?
Like you say, these are 30 year old boats. A bit of softness in the aft deck or the odd leak to chase down did not in any way detract from the memories we've made while cruising our coast