I always love listening to your card critiques. I'm trying to learn to judge custom cards for myself. A lot of the surface mistakes are easy to spot, but I still often miss nuances of how cards affect the environments around them. I can always learn a lot from your reviews.
Your reviews were pretty spot-on. The only one I might disagree with is Goblin Beastmaster. The drawback of sacrificing the beast at the end of the turn is quite interesting, as it turns the normal midrange playstyle of red-green beasts into something much more aggressive. A card that can change the entire dynamic of a deck like that would be something really cool to see, in my opinion. I agree that being unable to play your cards due to them dying at end of turn would feel bad, but that can be easily fixed by making the ability optional. "Whenever a Beast creature enters the battlefield under your control, you may have it get +2/+2 and gain haste until end of turn. If you do, sacrifice it at the beginning of the end step." With that change, I think the card would be quite good.