Been loving this mod so far but is it possible to configure the way the plant is placed? I'd like to make a custom seagrass but I prefer it to stay still on the same spot each time I place it like vanilla's seagrass. Greenery's custom plants get placed on random spots like flowers.

Do you mean with bonemeal?

Here's a comparison between Subaquatic's Seagrass and Greenery's Watermilfoil. The placement is more random on the right and I was wanting to make it more like Subaquatic on the left.

While agree with the ability to change it for maximum customization; wouldn't it actually look better if Subaquatic added the ability for block offset to make plants look more organic?

Ah, this. I can easily add a configuration for that.

In v4.6, add "hasOffset": false to the submerged plant .json configs to disable and then run /greenery reload.
The blocks must be updated to take effect, though.

Wonderful! Thank you for the swift response!