So loaded up Fallout 4 tonight for the first time in a while, found they've fixed my companion X6-88 (previously he'd never run, just walk, meaning he got left behind rather a lot, but then he seems to also think a bunch of stuff that happened didn't, so hey ho should still get his perk), and decided to explore the Glowing Sea some. After paying a visit to a couple of previous stop-offs I wandered much further and was thinking I wasn't going to come across much then suddenly holy....moses.
In a nutshell, well worth thoroughly exploring the Glowing Sea. Most mobs seem to spawn around the places you may have already visited, although you still have to keep an eye out for Stingwings and the occasional Deathclaw. Basically keep your eyes wide open and hit VATS with a long range weapon on a regular basis to scan your surroundings. You can then decide to engage the enemy, or divert your route around them.
There's also a Legendary goo-infuse Gauss Rifle out there, plus sundry legendary armour bits from various scorpions and whatnot.