It's still a JRPG with JRPG battles, though the encounters are non-random. You can see enemies in the level, and they don't respawn after being killed. That and the puzzles might make it similar to Lufia 2 in some ways :)
Not sure about Data Hacker.
I love Lufia... ;p
RPG-maker games can be really good. It just requires a talented person making the game. As with every other tool with a low barrier of entry, expect a lot of garbage for every actual good thing coming out of it.
Yeah, I believe in that too... but I also think the tool is very limited, and the games turns out to be all the same (with exceptions, of course) with the same mechanics. Unfortunately, I'm not able to have a "SNES-feeling" while playing those games...
But I guess I'll give this Eternal thing a go... :)