I've been test driving Premiere Pro and AVID trying to sort out the differences with both tools. While using AJA Kona 3 card for both apps I ran into an issue that took me a little bit to figure out and I wanted to share here in the event it is helpful to someone who might also still be actually editing in SD :)
What would happen is while playing back a 720x486 29.97 SD IMX50 Mb source natively it looked fine in AVID but when I played the same portion of the same clip in Premiere Pro (yes the sequence matched the source settings) , as the shot tilted down any horizontal lines were crawling/aliased, they seemed almost low quality/draft modish.
After assuming that it was something to do with App to AJA rasterization I finally poked around and found that when you right click on your program (Sequence) monitor you are presented with Fields menu with Display options of: Display First Field, Display Second Field, Display Both Fields. It was set to Display First Field. I changed to 'Display Both Fields' and Voila the alias issue was resolved, it looked smooth as the AVID playing the same clip.