Constitution increases Stamina and by that improves your general ability to perform in every basic aspect of the game, it means the more basic possibilities are available, the more impactful Constitution becomes. Sadly a lot of actions are gated behind other skills (like crafting behind SUR, stealth, theft and gate suprassing behind SCU and WIS). Thankfully, as far as i know, the WIS requirement for Begging got removed in one of the latest patches so we can use that to the advantage of CON. With more Constitution you are able to perform more actions during a half-day before sleep or until the game forces the time transition. Because the game has forced time transition there is a limit to how effective Constitution can be, you are just not able to spend all 300+ Stamina in a single half-day. The strongest benefit of CON is for sure the ability to fill all the stamima at an Inn no matter how much of it you have. As for your question, because of its nature of increasing Stamina, CON increases your performance in all activities. You have more efficiency in doing everything that the basic version of Lona can, like begging, working at an Inn(high constitution also improves your injury recovery from groping), traveling, plant gathering, clearing town contracts with hired companions e.t.c. Since you asked for my suggestion, as i already said, CON's strongest ability is being able to recover all Stamina at an Inn, therefore, when you are denied access to an Inn, CON feels miserable, your Stamina capacity is increased, but ability to restore it from Rest and Sleep remains the same, often i feel like CON has to rely on other stats too much to help with Stamina replenishment(while every other stat increases efficiency of basic interactions with the environment to get nutrition, which for CON doesn't exist(Prostitution is locked behind a trait so is not a basic interaction) which denies the power fantasy of 99 CON, so in my opinion i wish it was an inate feature of CON to increase the Stamina recovery from Rest and Sleep to match the growing numbers, my hottest take is gonna be that Rest should recover 20% of max stamina instead of flat 20 (20 at 100, 24 at 120, 30 at 150, 40 at 200 and so on). Additionally, CON may add increased Milk capacity before bursting for Hell mode and further, so you may accamulate more at once and can use all the lactation modifiers to your advantage so you are able to get 6 milk bags at once, which almost matches the price of Chease by itself since you likely lack SUR to craft it into Chease itself. It may also be combined with SUR for maximum profit on Chease. CON may also have its own cap after which it would allow you to give birth without knock out so you are able to recover and walk away without the change of a half-day, since the biggest problem of late-game births in the wilderness are ambushes after a birth knock out. In my opinion with changes like that CON will be much less reliant on Inns to restore the large Stamina pool it gives, and much more reliable in situations where you are forced out of Inns or Cities and have to live outside.