- The Caledonians razed Segontium but I subjugated their town and they're now a loyal vassal (wow, +100 relations on the same turn that I conquered them! Awesome) and they've got a powerful army so I'm confident that Britain has a strong northern buffer in Caledonia - I'm wishing I'd subjugated them before they reached Segontium, but oh well. I lost Camuludunum to the Jutes, but the emperor is in Londinium with a few Limitanei soldiers, who I've found are strong AF so I'm confident I'll be able to hold it whilst the northern army comes south.
- In Gaul I've repelled a few Saxon attacks, and also combined my armies there to wipe out the Suebi horde in a single battle. I hired local troops and mercs to do it, but I disbanded them after that and now have nothing to worry about RE barbarians in the western portion of my empire.
- In Africa I'm moving the Spanish legion to defend the northern coast, but the African legion is fighting the Garamantes, so far kicking arse.
- The Ostrogoths have been wiped out, but have looted a couple of settlements and liberated Illyria, and the Danubian hordes are a problem at the moment
- Barely making any money, public order is still a problem and food shortages hit when the barbarians raze settlements
That's my current experience of the WRE. As was said, I always manually fight battles, even ones I'm doomed to lose. I can regularly kill upwards of 400 men where the AI could only kill 50-100, and it's thanks to such attrition that I was able to wear down the Ostrogoths and wipe them out.
Limitanei were terrible in BI but I absolutely adore them in this. They hold the line incredibly well, excellent for allowing cav or missiles to hit the enemy flanks. For defensive battles I'm fond of basically campaign at towers and letting a mix of tower fire/infantry/cavalry wear down if not destroy the enemy. Nooby as tower-camping may be, makes more sense than holding the centre.
That said, on the economic side of things I'm struggling. I built some trade jetties in Magna Graecia and Massilia, but with my army upkeep I'm barely making more than a few hundred a turn. I don't want to abandon settlements, though, since they serve to wear down the advancing enemy armies, and besides, losing food/income that towns generate seems like it would do more harm than good.