Discovery Dish RTLSDR-Blog L-Band ACARS

Not an ADSB SAW filter, but wondering what @Lothar_ot_Hill_Peeps makes of this SAW setup?

This is what’s under the can on the Discovery Dish L-Band ACARS feed.
They were open about the typical design, LNA → SAW → LNA → SAW.
But how do those SAW filters stack up?
I mean, it works great, so does it matter? Yes, yes it does.

I’m on the fence about them using an SMA to BNC adaptor here.

For easy of assembly, I see why they did it… But… RF wise?