Correct, IMO.
But in the original scenario with the 3.5k# Dexters and "under-rated" 4-pack springs from China -- those springs will always be the weakest link in the running gear. Poor design - specifically regarding the short "2nd" leaf spring and questionable quality (at best) of steel will be a critical path to failure and breaking of the 1st leaf near the eyelet.
Jim Oliver, lead OTT designer, had it right. He likely knew of this shortcoming since he insisted on configuring his personal rigs with the 5.2k# axles and higher rated (2,750#) spring packs. AND, the "Jim Oliver" configuration has yet to report broken spring packs.
Owners having chosen to upgrade their rigs with Alcans or similar designed/rated spring packs are clearly on the right path and making an informed decision leading to significantly lowering the probability of spring failure, IMO.
Do not second-guess your decision to toss the Chinese packs and upgrade your running gear to a more robust/safer configuration.
For us, the 5.2k# Nev-R-Lube Dexter's with our new Alcans are close-in on our radar screen.