I agree, the Blues are in great shape, however if an RFA looks at Broberg asking for 1.8 from the Oilers, and getting an offer sheet from the Blues for 4.58, then any RFA is going to think about not signing a contract until other Teams have had the chance to send over a Offer Sheet.
Since Neighbours has been brought up, lets say Neighbours has a really good season in 24-25, and nets 45-50 points. That would put him at roughly .47 - .50 points per game in his career. Now Lundell and Byfield, both drafted in 2020 like Neighbours, had .49 Byfield and .52 Lundell, career point per game numbers, when they signed their new deals this summer, 5 million AAV Lundell and 6.25 AAV Byfield.
Now if Neighbours hits those marks and the Blues offer him anything less then a comparable contract, he should absolutely go to July 1 and see what other Teams are willing to offer.