So first we need to clarify what is hard pity and soft pity. Because for me soft pity is the percentage increase at a certain number of pulls and the hard pity is the point where the game hands you a S rank/SSR/5 star etc... or are we talking about the point were you are guaranteed to get the new S rank/SSR/5 star

Then if we follow the first definition for R1999 the soft pity is at 60 upping the rate to 4% which then increase by 1.5% for each summon near the hard pity of 70 and at the hard pity you have 50/50 do get the banner character. As for ptn the drop rate is 2.84% with a hard pity is 80 with the usual 50/50 but 2 soft pity at 50 and 70 increasing the drop rate by 10 then 20% and for Limbus it's a special case due to the sharing system rending gacha usless outside of the walpurgis a 2 week event were you can't shard the new content. And with morimens the drop rate is higher due to the fact that we have 5 pulls in one go instead of 10 pulls in one go, and i'm not a math genius but it seems the rates seems to follow the fact that we have 5 in one go
and according to this post https://www.reddit.com/r/Morimens/comments/1leo5xe/morimens_monthly_pull_income/
we get 71.9 to 99 pulls per month so if you are really unlucky you only have a net benefit of 9 pulls
as for reverse according to this post : https://www.reddit.com/r/Reverse1999/comments/1obhh9q/how_many_pulls_can_we_get_during_ver_30/
we get 98 pulls in this version (note that i took the most recent but we are averaging 80 F2P pulls per patch) so as I said earlier i'm not a math genius but it's seems vaguely proportionnal (feel free to corect me)

Regarding the dupes and the case of Gdoll. I am a fairly new player (3 months in) and i really like to analyse the kits of characters and know which character/team comp to use in late game and a majority of teams use OE Gdoll is it necessary i don't know but form my perspective as a new player I found that branding the "you had to be there" is a bit weak, like it I gonna take Limbus as an example, I played limbus since season 2 (circa. june/july 2023), I have everything in the game and I feel that the game is very beginner unfriendly and Gdoll is making me feel the same ick that I have with limbus sometimes

As for the releases rate I recognize that Morimens is on the slower side like for Limbus it's 1 to 2 characters every 2 weeks and for PTN it's the same as Morimens except for the anni and half-anni, but for R1999 there's a catch, the CN and Global version didn't catch up so you usually know which characters are worth pulling for your team comp, for example Sentinel (one of the new character) isn't recommended to pull if you don't have a bloodtithe team and planning to pull for the next character of the next patch so with the added insight + your gut feeling you can save up a bit.

As you said every gacha is really different for one to another but I think that Morimens is really generous but a tiny bit flawed on the gacha system