Well yeah, I hear you and i thought about changing them - then I thought again. Here's what I mean: To keep my ESP I'd need to stay stock. Of course I could change to the H-D SE lifters but I hoped that is what this motor already had since it was a replacement itself and just after the time they had a running change in production from the C lifters to the SE. Once they tear it down we'll see I guess.
And what about pushrods? If I went with adjustables (even H-Ds) could ESP point that that as a cause of future failure. So to be safe probably need to stick with stock one piece prushrods and the extra labor that enatils. So to change out lifters, probably inner cam bearings with labor would be pushing $1k. Now I paid good money (and quite a bit of it) for the ESP so why should I spend my money doing their work? That at least was my cheap azz thinking. Chit if it fails let them pay to fix it. I mean that's why I bought the ESP, right!
A few years back when my Dealer had to do some ESP work in the Cam Chest of the '05, they asked me if they could put in the SE Adjustable Push Rods (at no charge to me) since it was a wash cost wise to the Dealer on the first time and they would more than make up for it $$ on subsequent visits to the Cam Chest...
'Don't recall if I ever had to pay for the Inner Cam Bearings ($20-25) but I'm sure that I never had to pay labor$$...
Depending how long that I was going to keep the Bike and / or ESP intact, helped me make the decision whether to let them fix it their way or my way...
My Dealer was of the mindset, "don't pay for upgrades (lifters etc...) above what ESP will pay for, if it fails again, let ESP fix it"