I am a single player user as i don't have any internet access in my room. It has been one year since is started playing and i am starting to know quite well how to manage the IA.
My goal when i play is to avoid the boring strategy : entrench in a few planets, make a lot of research, build an invincible fleet, go in rampage that mean that if you wait enough time, you will eventually win (i mean game longer than 5 or 6 hours)
So, usually, i build a small fleet (2 caps, only one supply research) to conquer 5-6 planets within the first 30 minutes and then start pressuring the IA in its frontier world, playing cat and mouse with its. I use the multiplyer tricks i read here : fighting alongside repair bays, using carrier and LRM asap so i am always in the offense. I save a lot of money from building defense (apart to get rid off the annoying siege fregates raid) that i use to make an economic boom (trade ports and so on) then as soon as i have enough ships, i crush the IA (around 1h-1h15 of play if i didn't screw it).
I explain this to you not to make me looking smart as my skills are not impressive at all but to make you see my way of playing.
Thanks to this strategy, i had a lot of intense and fun games in vanilla sins.
Then entrechment came. Great game, the starbases and the new stuff are really cool. Cool enough that i don't want to go back to vanilla sins.
So what's the matter ? Well, the ia in entrenchment has become too boring to deal with. The fact is that starbases are a pain. They are well balanced but they cost so much money that the IA cannot manage to build a good fleet and good defenses. As i save a lot of money from almost not building starbases (always in the offense so i rely on fleets) i win against the ennemy fleet far more easily than back to vanilla sins. if i am fast enough, it doesn't have to build upgraded starbases so it doesn't slow me down. Where the things get really boring is when i move to the next enemy or the next after it. He stars to get real starbases (you know, the weapons lvl 3, health lvl 3 kind). Three scenarios here :
-the starbase is TEC or Advent : i phase jumped afar from it and kill it with bombers (which takes ages in mid game when you don't have 30 bomber squadrons yet and is boring). If i have TEC, i can use the missile launcher if i am rich enough but these things are so expensive and take lots of fleet supply.
-the starbase is vasari : either i wait for missile launchers reinforcements or i try taking with a massive battle. Generally i win but with enough losses for me having to wait licking my wounds and for new ships to come.
-the worst : Vasari starbase with mines and/or a fleet. Really painful as i have to build squadrons of scouts to clean the minefiel before attacking.
I am used to losing ships but it is more exciting in a space battle than again starbase (i mean, last game i played, i destroyed 10 starbases, it becomes humdrum at the end)
My point is that : entrechment has fun stuff but not only does it weaken the IA badly, it completely slows the game down. In a way, it's normal : the name is entrenchment, not space battle but still. I am sure i am going to win as my fleet is better than its (considering the money it spent in defenses) but when i think about the numerous cleaning starbases&structures, i can feel the fun going down.