As an older fan, I appreciate the playablity, and I enjoy how well they incorporated form and function together. It reminds me of the Toa Metru, except the Toa Metru had slightly less posability and a slightly better look (in my opinion). However, playability doesn't matter unless you actually buy the set. If it doesn't look interesting or unique, you'll never get to the playability. That's why it was so important that they establish a solid aesthetic early on, and why it's such a shame that they didn't.
On another note, the Metru were probly the most coherent and well-designed Toa we ever got. I mean, they just look like proper heroes, their stance, silhouette, that amazing G1 eye shape (something they probly should've carried over to G2 in some way), and their proportions. The Metru are just... man they look good. The Uniters gave me the same feeling when I looked at them. They look like they belong together, but they don't look so generic that they blend in with any other CCBS set. It's a shame that we got them in the second year and not the first. Maybe I'm focusing too much on art and looks, but that's super important when it comes to whether or not a kid is going to be interested in something they see on a shelf.