I am not a fan of having a Final Destination version of every stage because Final Destination favors some characters and hurts others. For example, Robin can preform well in a setting like Battlefield or Town and City, but when you place him in Final Destination or an Omega version of a stage, it is more of a uphill battle for him.
That is why I am a fan of having hazardless stages. Platforms play a big part in some characters cases as added platforms can help or hurt a character. That and Super Smash Bros. is a platforming fighting game; platforms are a big part of the equation.
However, I think that some stages should be altered slightly. For example, hazard less Pyrosphere wouldn't be a good stage for a one on one fight alone because the stage is very big; the stage should have the same layout as Pyrosphere, only smaller. In cases like The Great Cave Offensive, they need to create a slightly different layout to create a neutral stage. In cases like the Temple, only make a section of it playable, such as how PM's Skyloft is a section of the Temple.
I think that hazard less, slightly resized, and slightly different layouts to create some neutral stages is how they should of handled For Glory. Have the regular version of the stage be available For Fun and when you just want to hang out and have the Omega versions be neutral stages. Again, Final Destination benefits certain characters a lot and hurts some characters; besides scrubs abusing him to win, there is a reason why Little Mac was so dominant in For Glory during the 3DS's initial release.