2.4 is live in 2days(or is it 3, whatever, this week), so what happens in 2.4 is relevant, especially if you haven't played in a while, so you're not actively playing now in 2.3. In 2.4 especially you can play with any skill and make it work with LoN, however that takes a while.
There's also Firebird which pretty much makes any fire rune of a skill viable(and almost every skill has a fire rune, barring like Ray of Cold) and requires much less time investment, especially since you're given a free firebird set in season 5 if you play that(starts friday btw, so still relevant).
Tal Rasha makes a lot of skills usable, although you do need to make sure you get your elements right and you have to use a bunch of different skills. Delsere makes certain specific skills good, but it's a rather large selection which is increasing in 2.4 some more.
Now in general, Wizard is going to be stronger at close range, due to that passive that does more dmg to stuff close to you. That's a tradeoff every class gets, and also because in general, keeping stuff at range isn't that easy. But overall, other than Archon stuff which is fairly melee centric, everything is mid to long range and as long as you bother kiting, then you can keep stuff at that range.
I'm not sure what was the build for wiz back when you played, but I think the last time a real melee build was dominant was CMWW back in vanilla? Season 1 and 2 was like Firebird/Blizzard/Hydra stuff and it was mostly kiting centric.