Only 25% more efficiency?!? In the buisness world thats like a miracle. Still, if your doing alot of workits very usefull
Well, we used to get 10 blocks per bin back when it was one block per stone, so they
were 900% more efficient. So yeah, 25% earns an 'only'. And the stone is 80% more efficient from a hauling job perspective (provided you have a wheelbarrow), so you need to balance those two. Blocks used to be no-brainer more efficient. Now, it's going to depend a fair bit on how you do things - if you have a very diverse worksite where you're building in multiple locations, you do it the old way. But if you're working on a dedicated project, you're probably better off with this kind of setup from an overall efficiency perspective:
111222233
111222333
411122333
444MMM355
444MMM555
446MMM555
666778885
666777888
667777888
Put your workshop close to your work area. 1-8 are stone stockpiles, each with 3 wheelbarrows. M is the mason (etc) workshop. That will generate 24 simultaneous stone hauling jobs. You can fill the 72 stockpile spaces with 3 hauling cycles. Those 72 jobs, 3 cycles, will produce 288 blocks which would require at least 288 hauling jobs and take up 59 stockpile squares, requiring also 59 logs, with 59 hauling jobs for those, 59 carpentry jobs, and 59 hauling bin jobs. You're now up to 465 jobs. You can reuse the bins, but still, you're pushing 360 jobs vs 72 by simply building and rebuilding your workshops where you need, and leaving the blocks in the workshop (you can put hundreds of blocks in a mason workshop before you get job slowdown). With 3 hauling cycles by 24 dwarves, you'd need 120 dedicated haulers to turn over the blocks in the same amount of time - and there's no speedup in the jobs with the lighter blocks because the wheelbarrow negates that with the stone.
Note that in the layout above each stockpile is slightly staggered to keep 2 tiles one unit from the workshop and 4 tiles 3 units from the workshop. The masons should draw stones off at an equal rate from each, on average.