Actually because of its Armored Properties its actually easier for everybody to land... Casuals and Pro's alike.
The purpose of that button is specifically to help new players get started. If it was harder to pull off then it literally would have no reason to be there in the first place... and thats kinda problem the game is having right now...
I believe having an "easy" button is not gonna help people get into the game, it's gonna hinder it. Why would they wanna learn the rest of the games mechanics, if you can pull off amazing, over the top animated attacks, that deal lots of damage? Why would you bother learning the stun system, the launch game, throw setups and counter system that DOA has to offer?
Young people and people in general these days, have a very short / "low effort" learning curve. They want to be good immediately and don't want to commit to a game that takes to long to learn. If they go online thinking they are amazing at the game and then get beaten, because all of us who bothers to learn the game, just counter their S command combo, will get mad/upset and think their opponent are using cheap mechanics to play the game. Just look at how the hate speech in social media and playing online in general.
DOA5 started out the same way with spamming PB in early DOA5 builds, but PB's was nerfed before DOA5 Vanilla was released and that turned out fairly decent in my opinion. I would rather play DOA2 and DOA3 over 5, but it's still fun to play DOA5.
Fighting games has a loooong learning curve and are hard to get into and DOA is already a good game button mashing wise. People get into the game because of the great training system, command training and also people online and offline teaching them the ropes and the way the game is played. People get into fighting games because they want to learn the games mechanics and that is not because of the EASY command they will become fans of the game. Either you like the game or you don't!