New SSD slow to boot

Hello all, I have an Early 2014 MBA which came standard with a 128gb SDD. I wanted an upgrade, so I purchased a 480gb SSD from OWC, the Aura Pro X2. One thing I didn't like is the extremely slow boot time. 50 seconds to the login screen, FileVault is off and I already tried their suggestion of selecting the start up disk in system preferences. Once logged in, everything works great, apps are snappy and responsive.

I do know OWC has a web page stating that 2013-2014 Macs have slower boot times because they were initially shipped with AHCI SSD’s.

I was just wondering, other than purchasing a used AHCI SSD, are there any decent alternatives? TIA.