Icon Templates and Barubary's Icon Maker

[Garamonde]

I think x2 zoom is plenty for almost everything (you want it to stay at even increments after all), but a custom opacity can be set via the Transparency > Opacity > Custom option (I haven't used it myself though).
but I agree about being able to overlay more than one image before placing it, because I often make quirky icons where I use more than one sprite and it can be a hassle trying to figure how to place them without being able to make adjustments.
he has not been on TSR in a long time for being busy but I could try to PM him sometime I guess since I asked him to make V3B.