As far as creature-lands go, becoming an 8/8 for three mana isnt a bad rate, but with no evasion or other relevant combat abilities, you kind of have to really pick your spots for this
This is another problem without a good solution, as we want to expand with "extra spell" mechanics, but there's only so much flexibility in card frame design
Pioneer has a lot of room to grow, as it's not nearly as old as Modern, but at the same time, the question is what it will grow into
Surely, there will be a card out there for every Final Fantasy fan to be hyped about
Clavileo, First of the Blessed turns your vampires into demons, so some demon payoffs can be useful, but thats a vampire commander at its core
It gains haste and "When this token dies, draw a card." Sacrifice it at the beginning of the next end step