Think it is quite straight forward when comes to looking for the first pick - the seeded teams will be looking for another robot that will complement its scoring, eg. the good outfield (that can't do matchload that well) will look for another robot that can do matchload, etc.
But since most teams from the same school/club/organisation will be spread throughout the different divisions, scouting will be very important. You can't just rely on the usual "we-have-always-been-practicing-together" logic anymore.
And teams/robots complementing each other will also include the autonomous routines. Autonomous bonus is worth 2 highest stack bonus. So it will make a difference during the elimination.
And my guess for the 2nd pick will be a defensive-bias robot. May or may not be totally defensive robot, but one that can play defence really well.
I really don't think we will be seeing a lot of high scoring games in worlds, simply there won't be that many instances that the teams will be left untouched or unharessed to do the scoring. So there will be a role for the defensive-bias robots.