The skills weren't lost overnight and they wont come back overnight just by putting a lot of money into this. This needs to be planned and managed properly to ensure they get a decent balanced force... it wont be as big as the Soviet Navy was, but it should be more capable... the simple addition of the UKSK launchers means ships that used to be anti ship or anti sub can now be both and more... they can have long range attack capability too... which was only previously possible with a nuclear warhead. The new terminal guidance systems mean it can now have precision long range strike capability now too... which makes it much more flexible.
The new hupersonic missiles... if they are compatible with UKSK launchers should mean they are even more capable across the fleet... in fact imagine a new type of weapon... a ballistically delivered hypersonic missile cluster... a SLBM with a ballistic range of say 3,000km with a warhead payload that consists of 3 hypersonic cruise missiles with a range of 5,000km. The Missile is launched from a submerged submarine and follows a ballistic path to 3,000km range where the payload enters the atmosphere and then turns horizontal at about 30km altitude and the payload splits open with 3 hypersonic missiles separating and accelerating to mach 6-7 with scramjet engines... after the ballistic flight they will already be travelling that fast or faster anyway so they could coast at high altitude till their speed starts to bleed down and then start up their scramjet engines and turn and head towards their targets that might be a further 5 thousand kms away... few ABM systems could stop such threats as they will be able to fly dogleg flight paths to the target and indeed with sub launch could come from completely unanticipated directions. Flying very fast and very high they could release a dozen small nuke warheads during their flights and wreak havoc on an enemy state... their goal not to be a precision first strike weapon but to be a destruction spreader that ABM systems wont be able to cope with that will ensure the enemy state does not have localised damage only in specific strategic areas... a real MAD weapon.