You´re wrong if you think Paradox will make them release a better DLC or more polished content. If anything, it will be exactly vice versa.

Even when Shadowrun games were released they were badly optimized (no wonder, they are a small company), but they ironed it out with patches and subsequent Director´s Cut/Extended editions releases, which were free!

Do you really think Paradox will have them release such a meaty upgrades for free?

Harebrained will make Paradox release better expansions and content?

The original game was... amateurish.

The first expansion was... meh.

I expect nothing special here. Sorry, but you'll not see my money.
Many. A few months I don't play it anymore, but I guess most of the problems were about uninteresting missions.

Begin new mission, wait a few turns that enemy comes to you, perhaps well positioned, never exploring the map.

Enemy gang on you: often with seemingly impossible odds.

I don't remember there was a working cover system.

UI was slow as hell, even on every high-end computer and... o yes, UI was crap.

Outnumbered. Always. Constantly. Pedantically... but AI to dumb to pull it off.

Environments: 100% boredom.

Very few weapon systems. Limited contracts. Not much to do once you completed the storyline...

Unfortunately I don't remember details, but I remember to be annoyed as hell by the overall lack of polish.

Not sure what you are trying to advocate, as the game is generally poor implemented.
As a reminder, when released, the game was constantly crashing, freezing and the UI slowed down to a point to be unusable.
They mitigated the problems, but is still there.

You don't believe so? Good. I'm really happy.

Anyway, squeezing my memory:
* The lack of cover system is a big minus.
* The lack of interesting design of environment is a big problem.
* Poorly thought UI, that made everything painful, was a problem.
* The abysmal AI is a big problem.
* Lack of intelligent (I.e. not massively unfair) missions balancing is a big problem.
* Lack of weapons system implementation is a big problem.
* Limitation on how many mech you could lunch while, again, enemy had loads.
* Completely uninteresting missions after the main story line, bleah.
* First expansion added more uninteresting stuff. And you paid extra for it.
* Oh! The bloody non skippeable videos :D

The above is subjective? Perhaps.

Adding "big problem" next to a (I assume) a fact, doesn't change the fact.
Also several facts of what you mention are indeed on their own a matter of opinion.
So what I get from your otherwise helpful original reply and this one, the game has some issues which can be taken as severe or light as one likes, and the game has some design choices which you personally don't like. Which is all fine.
I thanked you for the info. I am not sure how I am trying to advocate anything.
Apart from the very last thing about unskippable videos. That's just unforgiven in the 21st century.