Between current powerful decks losing some of their pieces (Monastery Swiftspear, for example, should be gone) there may be more room for a solid 2-drop like Sabotender
You can use the loyalty ability immediately, and keep it as long as your Dragonlord is around to keep it Seduced with Power
What catches my eye is that you have multiple things you want to do with your creatures in your graveyard and some of them are anti-synergistic/not efficient enough with what you want the deck overall to do (as far as i can tell)
Sometimes the Secret Lairs arrive in a week or so
Just keep in mind that each player has their own Lost Zone, so even if your foe is running a Lost Zone archetype, you will have to keep count of your own Lost Zone card count
Sure, its an aggressive deck that plays a good amount of mana ramp and small, impactful creatures