Hearthpwn

Leeroy Jenkins easily replaceable with Doomguard if you don't have him. I do think Leeroy is better than Doomguard overall in this deck, though, as it is one extra damage for the same mana, plus you don't have to worry about discarding things like Power Overwhelming and Abusive Sergeant that could be used on it as additional burst.

Runic Egg was in the initial build of the deck, but it was cut in favor of Flame Imp for some desperately-needed early plays. Dragon Egg just seems like a bad card in this build, as its effect triggers on damage, not as a deathrattle, so it would be little more than a token for Ravenous Pterrordax. There is something to be said about combining it with Dire Wolf Alpha or Abusive Sergeant, but even then, the extra 2/1 doesn't provide enough presence to justify running a 0/2. I'd rather have the card draw from Runic Egg in most cases.

That said, there is not a single draw card in the whole deck. Wild is aggressive enough at the moment that Life Tap is often not ideal, so there is a possibility of Runic Egg or even Mortal Coil working its way into a future iteration of this deck.

As for Abyssal Enforcer, it is one of spots in the deck I am looking at revising. It was included for its flexibility, as it can function as a big minion for the late game, a way to pop eggs, a way to set up trades, OR as three burst damage, but oftentimes the effect is underwhelming. I may test out Dr. Boom or additional burst in the slot instead.

how important is leeroy? could i replace him?

Have you considered running the other eggs? Also, why Abyssal Enforcer?