Reforming the Conquest (CQ) System

The latest conquest took me 5 days, feats can be easily cheesed to the extent that next run I expect to finish it in 4 days.

CG wont do as you ask as I wouldnt bother spending crystals on refreshes in order to farm DCs for a week.

Conquest is better atm but the raid takes too much time for higher players. It's ridiculous how much restarts you need... I know 6 players (high players, spenders) who retired this week. CG ignores a lot of the feedback and it seems that CG wants that the players spend more time in the game. But at some point it's too much time and you realize that isn't good for life-balance and you stop playing. 

So you could spare 4 days at least and spare crystals id you don't need more DCs... I think it will be only good.

Well... I usually finish raids with max scores (on the specific relic levels) within 1-1,5 hours max using HotUtils. Usually only the Luminara team needs more attempts.

I need all the DCs I can get as its cheaper to roll new ones than re-roll to get the best ones.

Point is why would CG do what you ask as there is no benefit for them, and as mentioned Conquest is a breeze and nowhere near as difficult as you claim, and within a few days we have time saving ways to cheese it too. In fact this one has been even easier than previous which were not hard, some feats can be dual cheesed in a single battle.

Also it should take some effort to get these rewards as not only do we get the characters, the box rewards  but also a lot of relic and G12 mats via the Jawas, all of which have high crystal value.

The only way they are likely to make it simmable would be as with the top tier conquest pass and make people pay a premium price for it.

TLDR: its fine, if you want to rush it and maxiumise DCs like I choose you can, if you don't then finishing it with zero crystal outlay in 14 days at a gently pace is possible.

They ignore it because the entire point of it being a pain is it tempts players to put resources into the raid teams for an easier life. Its pretty simple to just work out whats the easiest level for each team and just take those rewards, granted my total is 5.3m and not max rewards but rather than stop playing I take that and it takes me about 30 mins 1 shot per team.

Why stop playing when you can choose to get lesser rewards and save time, far better than receiving nothing!

It's not that simple. If CG does not lower the overall time needed to play the game they will lose the player base... which is way worse.