To be honest, I'm pretty concerned about these changes.
Yes, the lower levels can be rough, but speaking as a mid level (31) its not uncommon to wade through several missions without the need to even us an inspiration. That is in human form (only teamed with a human form Peacebringer). Although will admit that I switch to Dwarf from if we are over-run and my controllerish powers have yet to recycle. My build revolves around being a panic button, ie. things get rough (hopfully) I'll have something at hand to either allow enough time to escape, regroup or simply for powers to have enough time to recharge. This for me, seems to to work great for solo and grouping.
Persoannly I feel the HP reduction will have a greater impact than the -30% resistance. To the extent that at the moment I would prefer things to remain untouched, but that's why there is a test server. So I reserve full judgement until these changes have been implemented.
At later levels, which slotted shields you are basically (near) scrapper HP with 0%(ish) defence (unteamed). While this balance will result in pretty much the same scenario (due to higher mitigation) for a Warshade (at least) it will affect more than just the Dwarf form. What about Inky Aspect, HP plays a major part in that power and is probably one of the best powers a Warshade can have. The HP drain on that is essentially self inflicted, so is the drain going to be reduced as there will be less HP in general?
I also dare say other issues will arise, that have yet to be realised.