It would've been swell if you read the whole post or actually replied to the portion you quoted.
Frames are, while terribly balanced, not that big a deal for me because I own them all. Baruuk Prime is done tomorrow and Nidus is also in the oven (I do have the regular though) which means I'm entirely complete again on primed and regular frames (some I just don't think are good miss an exilus mod).
It's about the S#&$ modding and weapon selection. I do see you got offered Mirage. I got Mirage last week and picked it, proceeding to the weapons. Quickly put her back after seeing Synapse with default modding being legitimately best weapon offered.
There are five categories of weapons for me:
1. Full build. Arcane, Forma etc.. Potentially a Riven. A subset of those are niche weapons which are going to be super clunky in the Circuit however, especially without a Companion fixing ammo economy being nuked from orbit for some items. There is still a huge gap here, weapons are really not created equally and neither are Rivens.
2. Owned, leveled, kept. Not good enough to invest anything in it without a Riven but it cost e.g. a Forma to make so I keep it. Will have garbage default mods and thus unusable.
3. Previously owned, leveled and sold. Sold because it's actual trash that no Riven can salvage. Will not do no matter what unless it becomes an Incarnon Genesis in the future (my Stug Riven is in the holster). Also a few that got leveled and built into something else, like the Miter which I have not rebuilt because I didn't pick it this week.
4. A set of weapons, owned and unowned that seems to be unable to show up. Never ever saw any modular weapon, which is a shame because I have Rivens for all Kitguns and nearly all Zaws.
5. Weapons I don't have or ever had. This is only a handful of very old or very new primed weapons (damn you Phantasma barrel!), most of which I don't care about and about half of the syndicate weapons which cannot appear randomly unless you own them anyway. The Tenet void key items are also incomplete for me because I will never spend them for anything but a workable element at 50%+ considering what a massive pain in the ass that farm is (less that I mind the Railjack per se and more the fact that it's S#&$ rewards per minute spent).
So getting a frame that might be good with good weapons hinges on what category is being chosen and it seems to be weighted firmly away from 1 towards 3 (and 4 seems to be impossible, just to skewer things more against the player).
I don't get to try out anything new at all because of the system. There doesn't exist an item that I didn't at least have an variant for in the past and if I no longer have it you can be certain there's a good and rational reason for it.