I'm glad you tried it out, and thanks for the feedback.
Yes exactly! I stated the things you said in the tips above here. You don't want to excavate more than 3 times before playing Jaraxxus, and playing Reno first makes things easier.
Playing against Aggro is still really easy with this package. You just need to manage your resources very well and know against which archetypes you're playing in mulligan and early game. I personally have more than 80% winrate against aggro. Playing around Pebbly Page effect is very important. Because when you overload and then play it, it will remove your overload effect, so you can play more mana in your turn again. Set up your hand in such a way that you can remove whatever comes at you. If necessary using Zephrys to survive.
My other advice is, keep your Flurgl Tox combo for as long as you can so you always have a way to clear no matter what, and ETC's devolve is very good against pirate rogue/shadow priest/even shaman.