Redshirt first years are of no concern to me if you are confident you'll be getting an elite player in the future. It's relatively rare that rookies are Pro Bowlers their first year anyway, especially late first rounders. Wha, we can't afford to not select another Taco Charlton or Byron Jones? We can't afford to miss out on another Connor Williams? Look, I like Connor Williams a lot, but his impact this year was not so great that we couldn't have held out a year without him. XSF ended up splitting time with him anyway.
If there's an elite player, take him. I don't care one bit if I have to wait a year.