IMO the game feels like a mix between Dynasty Warriors and Titanfall. Fast paced, focus on mobility and parkour, hordes of chaff enemies with priority targets sprinkled in, and various level-specific objectives to complete in the meanwhile.

The game is at its best when you sink time and effort into it. Improving your characters and weapons is based off of upgrade module slots that can be equipped across characters and must be ranked up to get their maximum benefit, and in-game crafting purposefully paces your content feed, with crafting weapons and frames taking anywhere from minutes to days to complete.

It's a ton of fun, and easily has like a thousand hours worth of stuff to do. I tried getting back into it recently but I keep crashing to desktop and I can't figure out why.

sounds like I might give it a shot if it's free (or can easily be pirated)

It's free.