I have a dilemma regarding optimizing a B2B SaaS blog for SEO

Hi guys

I have a dilemma and i was wonderinf if anybody could shed some light on it.

Ive started managing a blog for a B2B SaaS company thats been going for about 10 years. The blog has around 300 existing articles but SEO has been a bit of an aferthought.

As such they have tens of posts loosely optimized towards the same keyword or phrase.

I intend to go in and reoranize everything around the Pillar Page strategy ie have one highly comprehensive post for each main keyword supported by tens of articles optimized for additional more longtail keywords.

This will mean moving stuff around a lot and potentially condensing tens of articles around into just one.

Is this a good idea!? And is it really important to have only have one single blog post for each keyword??

Any help very much appreciated.