Sounds like standard boat maintenance on a boat of this age. Pretty much anything that is bolted on will need to be re-bedded at some point. If not they will start to leak. Some level of water in the core is not unusual in an older boat. Whether or not it is a problem depends on how much moisture. Might not be a problem if the work is done but will cause a problem if neglected. It is actually an opportunity to do the job correctly, which the manufacturer did not because it is costly and won''t cause a problem until it is out of warranty. Some of the parts will be relatively easy to re-bed and some will be very difficult. The job will generally require 2 people, one down below and one on deck. The mast step will require the yard to pull the mast. If you remove some of the core material around the hole and replace with epoxy you can eliminate water getting into the core when it does start to leak again. Note: if there is quite a bit of moisture in the core you can try to dry it out a bit before rebedding.