Yes, the range of clothes update didn't include the underwear type clothes but will continually adding some clothes in following versions.
I have marked your mentioned clothing into my schedule. For the swimsuit, i think i would assign them into the underwear slot.
Moreover, i might rename the off hand slot to glove slot and allow player to equip non-weapon equipment in that slot.
It is because the off hand slot didn't have any function now, so i would rather assign it as a glove slot.
I also like the concepts of some creatures and buildings, perhaps may adding them in the later version.
Thank you for your suggestions!