The Rework provided more room for more [Ship Type]-oriented skills. IE: An entire tree of skills that are Destroyer-relevant, or an entire tree of skills that are Cruiser-relevant.
A benefit of doing this is that it allows a more focused design-space for balancing, as opposed to having a smattering of skills for every type of ship creating a sort of mash-up build possible.
Also,
Type_93 is correct in that you can have 20 skills or 100 skills, you will have players that run the numbers and find the min-max'ed "Correct Build". That build will then be treated as mandatory.
For folks that are less concerned about min-max'ing, they pick among the variety of skills based on what they find fun.