You are not allow friend. From what I can tell, it is that a spell jammer can now deal 6 face damage instead of 2, while still drawing cards. I.e. 3/1 instead of 2/2.
So basically the spell jammer player gets more value from the body than before (without having to lose it on their turn). I expect some silly lyonar slo into spell jammer turn 1 when going second.
At 3/4, it would have been a slow enough body that it would not enable aggressive decks, while providing an effect that benefits the owner assuming that they are not under enough pressure to kill the spell jammer on their turn.
I think spell jammer as before will see play in the fastest deck in the meta game, however this time it will be lyonar and vetruvian for it being an alternative to 0 mana battle pet on mana spring into dialtos.

People will say " why are you playing something that you don’t enjoy", honestly because I feel deeply vested in this game, and want to see it do well. So it wasn’t so bad to pop in for a bit each day, play a couple games, and have it feel like it was worth the time spent, but with these changes it feels like way more of a chore, and honestly just not worth it for me. People will say i’m just whining, but I can’t help how I feel about it. I’m still gonna pop in from time to time and see how things are going with the new expansion and whatnot, and i’m curious to hear if any longtime players are feeling the same way as me