JUST a Quick update FoR EVERYONE HERE.
Queen has been massively Nerfed/changed, as early play testing figured losing a queen was the same effect as losing a hero in Warcraft III, and to game deciding and crippling for a Zerg player. Instead the Queen seems to go through size/role changes through the game in the same manner as the Zerg Main changes from Hatchery to Hive, Queen goes from regular to "Large". There are a bunch of spells it has now, but nothign seems finalized, so it is no point going in depth for it.
Queen doesn't build defenses (anymore) Zerg defenses are built by a drone, and can move around, providing they stay on creep, otherwise they lose all armor and move slow as ****.
I didn't see the big deal of moving photon cannons, was a meh for me but was removed AGES ago. Infested Protoss was also removed ages ago.
Missile turrets no longer are detectors (yay for terran players), needing a radar tower to detect units. Interesting to note detecting abilites have to be "enabled" for the Missile turrets with a radar dome, which gives detection to all missile turrets in an area, and will even scan and alert any incoming units in that area (including ones covered by fog of war.)
Both the Mothership and the THOR (and I hate ****ing repeating my self on this forum about this) ARE Not even close to being any semblance of big game super units. Mothership is pretty much a slightly better arbiter, and the Thor is basically a Goliath(powerful air attack, weak ground attack), with the added bonus of costing a ****load and being able to take a bit of damage.
For the Raiding concerns, the Queen and Zerg mobile defnses, along with the new quick build larva should ease that, as well with the Terrans planetary defenses.Not sure about protoss, but a quick warp-in seems as an easy quick defense in a weak spot. If anything I'm less worried about blinking/jetpack raids than I am with Colossi coming in all sneaky bullocks from behind a base and use the fact it one can "destroy a Nexus in 35 seconds".