Microblocks and Carpenter's blocks are great fun to use and can help turn ordinary builds in to something really awesome. Whether it's that perfect block pattern or just some extra detailing, they can make really make a difference. I love using them to help bring my builds to life.
The problem is, when there are too many in close proximity, they can really start to lag your build.
If there are parts of a build where you have trouble moving around, consider examining the number of Microblocks and Carpenter's blocks that might be nearby. Try removing some and see if moving around gets any easier. Think about which blocks are really important for your build and which ones are just stopping you from having fun.