I'll copy and paste what I wrote on another forum:
You know what? To be honest, I'm really happy about the songs they have chosen.
Endless Rain is great as it is, that's true, but I'd really like to hear a new version of it, it could be really interesting in my opinion. The same could be said for Rusty Nail and whatever other songs they decide to re-record. At least this Best Album will really have something new and won't be ANOTHER fucking Best Of, we have plenty of those. For the first time since the reunion I agree with a decision the band has made
And if we don't like the re-recorded songs we still have the old ones, right? Also, if you think about it, it's really difficult to completely ruin masterpieces like Endless Rain and Rusty Nail, if the new versions happen to be worse, they sure won't be SO much worse than the old ones, just different...and that's totally ok with me, I LOVE re-recordings