I'm not too worried about missing out on the DPP additions. Realistically, if a mid premo is added to the fwd line, its most likely going to come with a hefty decrease in scoring.
Your players scoring 95+ as and F5/6 is fine. There are so few fwds each year that go above 100, talk of an F6 with ~105 is fanciful.
This is true for the guys with genuine position changes or carrying a significant injury that will be there all season.
I would strongly warn against blanking on it though as the guys that are most dangerous are the names we're not considering right now because of preseason injuries that come back through the forwards, pick it up and then return to the midfield.
So for example, last year Tim English had quite clearly moved to a forward position and was going to stay there until Martin was gone (ultimately happened so not a perfect example).
At the same time though you had Kelly and Darcy as prime examples of guys who got injured and were managed through a pocket for a few weeks or eased back into the season before being unleashed to their natural position.
I'd say right now you've got Fyfe and Zorko who strongly stand out as guys who might be eased back in, averaging in the 90s but if they get their bodies right both are very capable of well north of 110 and would become game changing picks most likely.
Marshall another who can shift the range. Danger, Petracca and Bont are always threats.
I'd definitely be keeping a spot open until round 7 though, realistically F6 is probably the lowest point leak position on the field anyway so can afford to carry a rookie, especially if it's a Curnow type, a bit longer there to wait for the changes. Leaking 10 points at F1 from round 7 to about 14 when you can actually make the jump is significant if the only reason it's happening is a starting structure decision to not be flexible.
The other thing is that you're also closing yourself off to value picks by completing too early. It was actually one of my biggest takeaways last year as I did this too myself down back, having Cumming at D6 who was too good to upgrade over any fielded rookies but not good enough to keep and then 5 premiums meant I couldn't target guys like May or Daniel when they were bargains. Given the durability records up forward I don't think you can bet that none of the guys get hurt and become a lot cheaper.
Said it a few times, but this is a really weird season between balancing where the starting value/structure is pushing while not sacrificing flexibility and strategy in season!