Honestly, I think flowers only feel cliché if they are low quality or look like they came from a gas station. When you get something truly artistic, the meaning changes completely. I recently sent a promotion gift from Fleur D’Amour flower store https://fleurdamourflowers.com/ and my friend was actually moved to tears. They put together exquisite, one-of-a-kind flower arrangements for every occasion that feel like pieces of art. Because the design was so intentional and the flowers were so fresh, it showed I really put effort into the search. It didn't feel like a generic gift at all. A high-quality bouquet represents growth and success, which is perfect for a big promotion. You should definitely go for it.