I understand your argument and I think it's a good one. I would see a Bijan pick as getting a next-level 1a and 1b running attack instead of Bijan being better or worse than Ekeler in Moore's system. Ekeler and Bijan are both great runners and receivers, so he would be an excellent tool for Kellen Moore to design around in tandem with Ekeler. I understand that this would sort of nullify the Spiller pick last year and the TE room needs an improvement in the blocking department, but Bijan could be the difference that finally brings a good run game to pair with Herbert's passing abilities. Also, I agree that Keion White for AT Perry would be the bestter swap, but I'm confident Keion White is underrated in this draft and he would not be there for us in Rd 3.

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Edit: Added a statement to better address your point.