1mana monsters

I seem to have become the focal point of balancing for some reason... I'll address that in Exile's "Understanding Balance" thread as I believe it might actually be pertinent to the subject.

Anyway, the cards:

Skyrian Soldier: I shared your view-point Ultros. However, in a dedicated deck this can really be a very powerful card. You can pump it up and make it spell/ability immune. What's more the ability to be targetable and untargetable means you can have a monster like Prince Far'thin but can still be healed, boosted, etc. I'm sure when the change is made even before the stats are rebalanced, there will be some pretty effective decks using Skyrian Soldier as a focus; though that might be dependent on whether it comes into play spell/ability immune or not.

Mubble: Mubble Woods becomes a 1 50% chance Swimsuit. Not only is it less reliable, it can only be used at the end of your opponent's turn to get the monster out undizzed; not to mention it also has a cost.

Skeleton: If gotten out turn 1 the Skeleton can easily beat on the opponent and then be sacced when the opponent finally gets a monster out. Only later is there a risk involved in not recouping your mana by sacing the Skeleton. At the 2D value, you can sac a Skeleton on the second turn and play 2 more plus the Magic Skull. Skeleton can be the very mana source of a deck like this (although in my personal testing experience using it as the only monster as well does not work too well). I believe the decision in choosing between 0 or 1 sac is: should you be able to play both another Skeleton and a Skull next turn (1 sac value) or just one or the other (0 sac, you gen 1/1/1 naturally per turn).