Well I agree with you that Sbisa and Weber aren't similar players.
But, if I'm Weber I'm thinking I can get a payday seeing what Sbisa got. Weber's got leverage. 11 goals on the season playing top 4 minutes. He can use Sbisa as an example of how Benning signed a potential top 4 defenseman to a 3.6 million per contract. Then point to himself and say I'm already a top 4 defenseman that brings something unique to the table on this team. Goal scoring from the back line.
I'd be surprised if Weber signs a 1.5m deal. I'm expecting 3m+ at this point.
You should say he THINKS he has leverage or his agent will argue that point thinking its leverage. Realistically Weber has little leverage because we actually have a possible replacement for him in clendening. You could argue Weber is better or any other point you like but at the end of the day both are good offensively. Clendening is younger and due to the fact we gave up something to get him and he needs to clear waiver next year, he'll likely be on the team unless he has a horrible camp/off season.
Clendening has all the tools that he could fill in Weber's role. He might make more rookie mistakes and might not produce as much but personally i think his upside is higher than Weber and could be a better top 4 D in the future.
Also remember that now with Sbisa signed, there's pretty much 5 "locks" next year in KB3/Hamhuis/Edler/Tanev and of course Sbisa. Stanton likely will be moved (in my opinion) but if Weber doesn't stay, Stanton again going to take away any leverage Weber might have because again you have a replacement option who is a NHL Dmen (actually Stanton plays a similar game to Sbisa, not as physical but he would likely cost a lot less and could fill the role... reason i don't like Sbisa's contract at all but that's another topic).
As far as Sbisa's contract goes, it does raise Weber's value somewhat but again 'nucks don't have to sign him nor does he have to sign here. If he wants to stay here, he'll likely have to take less money (and again lose leverage). If he wants to sign else where, then he could get a decent payday. There is no pressure at all for JB to match any offer or sign Weber tho so he has little leverage when working on a contract with us.
Personally i like how the PP look with him there and would love for him to be resigned. It does mean we'll lose Stanton via trade and likely have little leverage in any trade but sometime thats the price you pay when you deal the way JB deals (getting players close to needing to clear waivers while their price is low also means you need to get rid of some players when their values are at a low 'cause you can only carry so many players).
I wouldn't mind paying over 2mil/year for Weber but if he cost more than Sbisa, it would be problematic for us moving forward. We do have Hamhuis/KB3 coming off the books but i think there's a good chance 1 if not both of them are resigned. Given the cap going up, they might even be looking for raises (tho not huge, even Sedins got modest raises). I would target ~2.5mil/year... any less would be great. Anymore and i would just be happy with the Ds we already have (which is a pretty solid group as is) and move on.
We actually have pretty good depth even without Weber with:
Edler
Tanev
Hamhuis
KB3
Sbisa
Clendening/Corrado/Stanton
Pedan
Also Biega if we resign him is a pretty decent option. Andersson has been great in the AHL this season (and pretty much every year) and if he comes back for another year could be another "option" we have as IR replacement. Not considering Hutton/Subban/etc since they are likely more long term options than say next season.