Is There Too Much Content For Liara?

Just to add to it and provide a complete description of the situation, it is true she walks away on Horizon, but if you romanced her in ME1, she then send you a mail and apologize.
By the way, I'm not sure if it is still there, but on YouTube you can find a voiced version of the letter, I found it wonderful, look for it if you can. (just checked, it's still there: link)

Also, even if you, after that, romance someone else in ME2, Ash is mad at you at the beginning in ME3, but you can fix things up and still romance her in ME3

Thanks for the link I'll check it out.

That's a good point and imo it doesn't only show in ME 1. After finishing the LE completely I can say that it's a quite common theme through the game that Liara is somewhat throwing herself at Shepard. I romanced Liara in LE 1 and went for Tali in LE2+3, who is my favorite LI by far. Still, in the Shadow Broker dlc it's seemingly harder to not rekindle the romance with Liara than anything else and in LE 3 you also get options for that right out of the gate even if she gets rejected in LE2 (and again halfway through the LE3 if I'm not mistaken). Also, her interaction in the base camp during the final mission in LE 3 strongly hints that she still only has feelings for Shepard. This all stands in contrast to the other possible LIs at least in ME 3, since for example Ashely has at least a fling with James (which you can weirdly enough reinforce in the Citadel dlc), Tali and Garrus have something similar if they aren't romanced by a MShep/FShep etc. On a side note, as far as I know Liara also is the only "true" romance option if you haven't romanced anyone before which also somewhat fortifies her position as the canon romance. But still, as I stated in my previous post, at least for Tali I don't really think that you get the short end of the stick if you take her over Liara however it surely looks different for a lot of the other LI's like Miranda etc.

It's more a case that other characters just do not have as much content as her. If you like Ash/Kaidan. Too bad. They are entirely absent from ME2 and the first half of ME3. If you like Tali, she's a squadmate you get much later in both ME2 and ME3. If you have the hots for Wrex, well there's something wrong with you. ME2 exclusive characters get a really short stick here. Miranda gets it the best, but everyone else feels so limited in comparison. Especially Thane. Garrus is maybe the only one that can come close to Liara.

I would be ok with Liara having more content if they didn't force Liara down your throat for Shepards that didn't care about her. No matter if you got Liara last in ME1, she will always be the ONLY one to save you in ME2. Not even Kaidan or Ash care as much apparently if you loved them or they were your best friend. Even if you are strictly professional or dislike her, you hug her and act buddy buddy with her on her DLC mission. Trading really terrible "witty banter." She is the only one who understands your plight in ME2 and sees that everyone else is too "short sighted" to get what you're doing. And in ME3, she gets the most humanizing scenes with Shepard and is forced on your squad the most.

The most irritating is when she just comes up to your room whenever and plants her ass in Miranda's old room with no choice from you. Since I only have Kaidan alive, Ash is not an option for me and I always romance Miranda over Tali. So I get the added bonus of her coming to my rescue in ME3 Citadel DLC even if I never talked to her ever. The bias would be tolerable if I didn't have to have her still forced on me several times throughout the series.

The series is certainly lacking in choice, and Liara is a prime example of nothing you doing matters.

👆This right here.

You made some excellent points so plus one like 👍.

Liara IS original trilogy.

That was only reserved for Liara though, otherwise Ash and Kadian would have gotten that too in ME2.

Listen to yourself, you are being indoctrinated by Liara and the Reapers.

I have a Fan Theory that the Prothean Reaper Sleep Agents thru gene editing gave Asari an mild indoctrination ability and introduced Siari religion to them to spread into the new cycle. Lets face it, Reapers are Wasted Potential.

that is a given.

She may be 'sweet' in the first game, but she seems to suffer from multiple personality disorder to me. That 'sweet archaeologist' is never seen again after ME1. She goes full on Godfather in ME2, and then utterly useless and dull in ME3 since she's neither an archaeologist nor an info broker anymore.
But to each their own. After romancing Ashley, Jack and Miranda I've decided I prefer Kaidan. (I only play M!Shep)