Ladd is a hit and yeah ofc right now his value is higher than ETN and Najee. It's not at the level Najee's was after his rookie year though.
The bolded is true, not really debatable. Looking at FFPC ADP data Najee was RB2 in dynasty startups entering his second season, a top half of round one startup pick.
Even as late as his third season he carried decent value because I traded him straight up for Breece Hall after Breece had his ACL injury. Which is of course a risk to say nothing of needing to wait till next year for my reward but Breece was going in late round one of startups entering his second season, even with the ACL so that's a good return.
ETN's value was lower after his rookie season because of his foot injury. Can't say for sure if his value was higher then Ladd's will be, seems kind of similar and I base that on fact ETN was going in late second round of startups after his rookie season. He did of course gain value and held it. I was offered 1.1 for him just this past off-season.
So it's true those two players are examples of players who after their rookie seasons had fairly similar (ETN) or better value(Najee) then Ladd.
But I'm a little unsure what point is being made? Just that anyone can lose value? I mean sure, but it's a lot more common with RB's. I think most know this from history but if not just go scan startup ADP data from last few years and it's a pretty glaring disparity of RB's that quickly lose value vs the WR's. There is not a valid reason I can think of to predict a signficant drop in Ladd's value other then injuries. They likely add to the pass catching group, that might impact Ladd a little but there is also several reasons that are probably more valid he should continue to ascend.