a short while ago i was told by a friend that holding crouch while rocket jumping (the flying part, not the launch itself) is not always a good thing because you can get denied more easily. crouch : more knockback. he told me i shouldn't always hold crouch because it could mess up my bombs depending on the situation.
Staying uncrouched while rocket jumping makes your hitbox 33% bigger, so it does make you easier to hit while in the air. If you bomb correctly you are going to have so much speed that the additional knockback you get from being crouched is going to be negligible. You can also use the knockback to your advantage a lot of the times.
Its just a fact that uncrouch airstrafing is impacted less by hitscan knockback. Whether the difference is big enough to be meaningful is what can be up for debate. Also, pencil jumping =/= good rocket jump and then uncrouch strafing. If you're going to bomb uncrouched and want to use a wallshot make sure to stay crouched until after you hit the wallshot though.
Its fine to have preferences for gameplay; but, in the explicit scenario of getting denied by a scout while rocket jump, there is no clear difference between crouching and not crouching after rocket jumping. This is under the assumption that the scout has 100% accuracy and always hits you with a full damage meatshot. 2b1af7f3a8