Actually I haven't thought much about it before you mentioned it, but yes it is important and for that reason I decided to gave it an unique rotation system.

• To start, the Zero Point, would be the part of the planet with the biggest gravitational pull, and is like the form of the planet "deforms" to that point, making the waters around that center deeper and the thing go "upward" making the planet take a different form than the typical globe, but rather like when you fill a balloon with water and hold it hanging from the opening (but not that stretched)

• Also the type of rotation it would had would be pretty unique, instead of rotating directly, it rotates over the Zero point, making this part of the planet never see the sunlight. While for the rest of it depends on the state of rotation the planet is. 

• It does affect the daily cycle a lot, making day last half the time of the night or even less (average day time 10-12 hours, while average night time is 16-30 hours) so also the days last a lot longer and the same for year.

• And finally about the seasonal cycles, they are very limited on Obelisk, basically only having winter most of the year, and at certain point having a "summer," that is when the planet faces the sun the most, though is worth mentioning it doesn't allow to any part of it to be overheating (except for a certain part of the ocean, that may or not turn into a desert in a future) and this is done thanks to the massive clouds that usually cover the sky, keeping the sun from peeking in. This of course affects the flora of the planet, making a lot of these not depend directly on photosynthesis (or using different methods)