As they say,a poor musician blames their instrument. <_<
On the M1 and related XIN/XOVR or RB, you remove the plugs, prewire, then plug. On the M1 itself, they're angled so you really can wire them in place if you want to. Very nice design, I'd take that over some of their competition's design for boards.
Some of the most reliable and stable connectors out there and very common in the industry. While I'd love for all hardware to be shipped with the terminals loose so it's a wire up and go, not all do that, as alluded to by Gatchel. Only downside, and I quickly got over it, is you wire the board in your hand, then slide the board into the can, call it a day.
The only other ones they could've used IMO on the other boards are the blocks that slide over solder pins on a board, however those loosen up over time or can be easily bent. I would, however, had asked for more ty-rap slots to have been punched into their enclosures, with the large knockouts coming out a little better than they do (I hate having to drag out the slugbuster to get them out cleanly).