I just finished a solo campaign - took quite a while. Plenty of rule changes to make it work. The fleet building and maintenance was fun and it gave me a chance to play the new objectives. I ran four fleets - built two clearly different fleets for each side.
The bonuses like skilled spacers and spies were ignored - no way to make them work. So the focus was on points and the interesting fleet building decisions that would arise.
As for the strategic choices each round - both sides would select the type of attack (base attack, resource grab) and then I'd randomly draw the fleets for each. Made for some fun engagements. Once the Rebels fell behind by a large margin, I let them pick the fleet matchups for a round as a last gasp attempt.
After 4 rounds I ran the big engagement - which took quiet a while to run but was a lot of fun. I let the losing team deploy after the winning team had all of its non hyperspace ships on the table, then deployed the fighters as normal
A few tips: I kept the fleets relatively simple - grouping similar squadrons in a fleet (all xwings and ywings with some named pilots, for example, rather than a big mix of fighter/bomber types). I also built fleets that had obvious tactics to employ - making it easier for me to make choices. For deployment, I'd sometimes imagine a cinematic reason for the meeting and deploy the ships to match that scenario - simplifying that process and making for more interesting story telling. After all, I was mostly looking for a reason to put cool looking plastic ships on the table.
If you have enjoyed solo armada, there are ways to make the campaign an even more enjoyable experience. Lots of theme and non traditional fleet building is great entertainment outside of table time
btw - I dropped the hidden base mechanic and gave both sides the same number of bases. And as for the resource grab missions, since I ran both sides I could force the defender to be more active (no turtling) I also tried running the convoy raid scenario as an actual 'protect the convoy' style mission with proxy freighters that had to cross the board- but I didn't get the balance right and haven't gone back to it yet. I've played a few naval scenarios with similar goals and these were quite fun.
good luck with solo play!