I played devPRO for some time (rl yugioh is just stupidly expensive). Yugioh has some nice things but there are some Problems that ruin it for me:
>Stupid Rules
The Rules are just an incoherent mess.
>The reliance on Archetypes
Most decks consist of all the good cards of an archetype, all the good extradeck-monsters you can Summon and all the meta backrow cards you can fit in. It really discourages creative builds and ultimately that's what I want most out of a tcg.
>OCG/TCG
It doesn't affect devPRO but it is totally unnessecary either way. I wouldn't have a problem with it if it where not for the limited legacy support in the tcg reducing deck variety even further.