Most people in the topic think it could use some improvements is all I'm going to say. It's not a game breaking issue, but seeing where a game performs at it's weakest and criticizing it in good faith isn't something that should be disregarded. I want to see this game become better, and reach more players. It's an early access and feedback is especially valuable during this time.
And yeah most of the improvements I talk about would be lovely as optional. Having options to categorize them into their block types, functions, and tech level would be greatly helpful by itself. I'd compare the blocks and items tab to the Rimworld menus, where it divides everything you can build into tabs like structures, furniture, production, temperature, power, security and more. By allowing that option you could already cut out half of the bloat there of structural and decorative blocks, and see the immediate tools you can make for the players who just want to learn by playing.
And yes the guide is a great alternative to the wiki, I appreciate more information than no information in game.
Oh and here's a quick reference / mockup for what it looks like in Rimworld, it's narrow enough to fit in the section, can act as either a drop down menu or link to a page with said item types. It would be easy to optionally disable tabs so they return to being the normal uncategorized layout. This would allow for browsing in the case for when the player doesn't know exactly what they're looking for, like torches in my case.