It is more difficult now that we're more squishy but yes, it does require different tactics. Before the patch it wasn't difficult to stand in place and heal; if you started getting pummeled by one or two peeps, then it was easy to heal yourself out of it. Now, a simple 1v1 will put us down easily and quickly. Immediately post-patch I was shocked to start dropping so much, but found that I could heal just as much as I was before with different tactics.
This is helpful. Do it, and you'll find you're more successfully healing. Cut your chops by practising it in Huttball; that's the easiest WZ to practise using terrain, LOS, and mobile healing.