DiDomenico ended up in Europe the first time because he couldn't stick to the AHL, and was in the ECHL in two consecutive seasons. After five seasons in Europe he tried a North American return, and ended up bouncing between three different AHL teams in a single season. He had 38 points in 50 regular season AHL games that year. Pointing to a 13 game playoff run as it being "far too easy" for him, while ignoring the much larger body of work, is rather silly.
NLA is where guys go when their North American options run out. It's a similar caliber of player to the AHL, but with an older age bracket thanks to it not being a developmental league. It is most definitely not in a tier above the AHL. It's a bunch of 30-something AHL guys with no NHL potential combined with home grown Swiss guys with no NHL potential. Mark Arcobello, Tommy Wingels, and Garrett Roe are among the early season leaders in NLA scoring. It's where former Caps like Eric Fehr, Daniel Winnik, and even Anton Gustafsson have gone when their North American options ran out. Nobody is going to contest that NLA is better than the ECHL (it very obviously is), but it's on equal footing (at best) to the AHL.