We all have different perspectives and opinions.
Part of good design is that it repeats itself. There are angles there, what ever goes there needs to be complementary of them. If you put an oval there then they need to give it meaning, not just put an oval there. It can be done with something oval on the wall, an oval base, or oval pillows maybe.
Here is a pic of a similar seating arrangement with an octagonal table, works very well with the space and keeps the design consistent.
Also a pic of an oval table in an angled seating area, works but the proportions are different than the OP's situation, and it will be tight to slide around.