I checked out your preview, and just some thoughts comparing it with my DVD -
Brightness, contrast and colour all seem good and correct. The green laserbolts are nicer than my capture, which is slightly off-colour in the greens and yellows.
The picture is noticeably softer than mine. However, the increased sharpness in mine has the effect of worsening the dot crawl and increasing noise. Even though you didn't use a noise filter and I did, my capture appears to contain about the same amount of video noise as yours. Overall yours is probably truer to the laserdisc source.
I didn't compare the audio, but I expect it's much better than my VHS source.