I think it's a little too soon to remake LoI, but what you're suggesting are all great ideas that would only improve an already great game. Remember the prologue? Well, instead of just telling us what happened, why not have the game start off with Leon and Sara in their village/whatever they live in, and then show now the next day Sara disappears, Mathias tells Leon what happened(there has to be an explanation why he knew(for example, he actually witnessed it)). Then, well you have to play as Leon, go to the church, renounce title, blah blah blah, then actually control his quest into the forest, and have a lot more area and an entire stage between Rinaldo and the castle. Well... then just add a few more areas and give it EXPLORATION. Also, some warp rooms would be nice. Oh and make Succubus playable, instead of Pumpkin, but still keep Joachim. Oh yeah, the last boss should be Mathias and Death together. Oh and you don't have to use items while you're being attacked, you should be able to pause for that.