Hearthpwn

I have unswer for every card why its inside of the deck, mostly it because I dont have better cards.
*Note1: I have some dust aroud 345 to craft something. So I can craft up to 3 rare cards and Up to 8 common cards.
*Note2 : Naxxramas is opened. Blackrock Mountain is almost opened ( I cant kill last boss :(, so I cant get Nafarian and 5 cost Paladin card, that draws cards and cost 1 less for each minion died this turn).

I have some questions:
1) Is there cards in my deck that are too bad to be inside of it?
2) Do you have any ideas which cards can be replaced with other cheap cards?
3) At this point I think I have to replace some cards, here they are:
    A) Haunted Creeper ( I don't know if there something more intresting for 2 drop, that can replace Haunted Creeper and still be a good minion on board. Here Im chasing a goal, so I can put a big threat for enemy on second turn or first turn+coin. And I can't firnd the best option here. My thoughts are: Annoy-o-tron, Knife Juggler, Argent Protector, Pint-Sized Summoner, Flame Juggler, Gilblin Stalker. Faerie Dragon.
     B) Also  I was looking for good 3-drops, and I didn't find anything good that can better then Harvested Golem. I think that Spider Tank also is good, but Golem alows you to have something on bord after removal, but I didn't test Spider at all, cause didn't have space for him and I found Golem to be too good. Also I was look on Silver Hand Regent but I think it is not a 3-drop but 5-drop card. Scarlet Purifier is bad because it can kill my Dethrattle minions, that's why I've replaced him in my deck. I like Aldor Peacemaker, but I do have only one, and not sure if I need to craft the second copy of it. And also I saw Warhorse Trainer he is really cheap to craft (but I think he is better to be a part of Muster for Battle combo).
    C) Piloted Shredder. Well I know this card is good - 4\3 and 2-mana minion after death. But I found it to be too squishy sometimes, its really easy to kill. Yeah mostly you gonna play it when you want enemy to wast his removals on it. Just thinking on replace, I guess that instead of 2 shredders I can add 1 more Sludge Belcher and 1 more Guardian of Kings. How do you think?
   D) Divine Favor. Sometimes it can be played really good and bring you more then 2 cards, but its not going to be a good card in everygame that's why I dont like it so much and it can't be playd on 3 turn like Thoughtstel from Priest. I mean I don't like cards that are situational. Because I was loosing too much cause I had such a combo-deck previosly with Nerubian Egg\Sword of Justice\Blessing of Might\Argent Protector\Scarlet Purifier\Echoing Ooze\Knife Juggler\Defender of Argus. So turning back to draw and Divine Favor - I dont know how to getter better draw, Do you have any ideas? I tried Acolyte of Pain but didn't found him to suit my deck I gues he has better synergy with Patron's warrior deck. So cause of bad draw I ran for 1 Divine Favor, 2 gnomish Inventor, 2 Hammer of Wrath ( Yeah its to expensive, I think it should has 3-mana cost instead, but it's still good cause gives me some removal power).

So counting everything said I think this deck is kinda weak at early game and mostly can't answer anything against tempo mech mage ( need to rely on luck). And this deck is to weak at late game, I mean its not that good at draw like a priest and patron warrior, and doesn't have enough powerfull minions like Guardian of Kings or something. And I don't know what to do at all, cause I have only 30 slots for cards and I have to do something to be strong enough in both early and late game aswell as at mid-range.