The future of the series

I d like to adress couple of these, even tough ive critiqued this game too, and it is no doubt a dissapointing ME game, but only to be fair:

boring, lifeless open world - like most of the worlds in ME1, but they are better than that, if only by not that much. H-047c is better than most of the ME1s worlds. If you mean the Nexus, Kadara port and all that, its subjective. Nexus is a poor man Citadel for me tbh, it doesn have half of the charm or the atmosphere of the original in ME1. Might be the lack of new aliens and the music tbh.
boring repetitive fetch quests - like all the 50 galaxy map fetch quests of ME3, or all the prothean data disks, matriarchs writings, turian colony crests and medallions of league of one in ME1, or N7s of ME2. Feels like a ME game to me on this part.
no mass relays, no mass effects - this is another galaxy, no reapers. And you see the Mass Effect in action every time you change the star system.
no space battles - did you miss the remnant fleet space battle near the end?
the protagonists are kids - yes they are more inexperienced and young, it was a design choice, they didnt want to go for another Shepard. whether you like em or hate em is subjective again.
enemy is not fierce or dangerous - Theres no way after the reapers were introduced they can up them with the kett or any other aliens they came up with, so its only natural they will not feel up to par with the reapers. Kett are an interstellar empire, like the protheans, the reapers destroyed the galaxys civs many times over and controlled their whole paths of evolution.  This is the problem when you play your big cards first in the story, the rest doesnt add up as much, when its time comes. You also know what the major problem with the reapers were: they were simply too strong and too huge. You needed a deus ex machina plot device to beat them, the kett can be beaten conventionally, what many fans of the original trilogy wanted we would do to the reapers, even if according to the lore it would have broken it into pieces. We can do this with the kett.
no meaningful choices - now this is kind of a funny one, considering back at the trilogy, its true we got huge choices there, who lived, who died etc. But. Then you had choices like the rachni queen, the councillor Anderson and the collector base which in the end really amounted to nothing, or a couple of hundred war asset points. It was an illusion of choice, nothing more. However even in the end of MEA, you do see your allies that youve made(like the other pathfinders) and how youve progressed depends whether captain Dunn dies or lives, for instance, or if you get help from the krogans or the salarians in the meridian vault, there are some consequences there. But i agree, its not the virmire choice, or curing the genophage, making peace with the geth or even the suicide mission. It is however better than ending missions of ME3.