Nice update cheers Jsy, and gotta say Wow! I didn't expect them to be that short & squat when i saw the top down pic! That is amazingly short, stocky, bushy LSTing going on there - u must've been busting those seedlings hard! lol! But seriously, they can't be more than 15inches from soil to tip - brilliant compactness. And also, can't remember u saying how long u vegged for??
And to answer ur worries, technically air circulation is effected, but i wouldn't think it too bigger a concern. If u had, say a 5 x 5 square of 25 similarly short plants then it might be an issue, but i think for u just making sure an oscillating fan is on them always is more than enough of a solution to anything like that.
I'll try & put up some pics of 2 NL plants i just done (pics at near 6wks flowering) which look similar to urs from top view (tho i think u may have more budsites & more even canopy!), but mine are alot higher off soil. I didn't have any air circ issues, tho due to not thoroughly following my own advice (doh!) i have got a few more lower popcorn buds than i'd like, but all the tops ones look nice still.
The only thing i'd say is i do now wish i'd done a scrog net/screen over them tho, as in last 3 weeks of flower alot were abit too top heavy & swayed over & stopped being considered top buds. I was able to tie a few into main stem or other branches, but some kept slipping off, or pulling other branches outta light too, etc so i deffo lost abit of final weight to them not being a fully even, stable canopy.
I think u should be ok tho as urs have got much nicer, thicker stems & branches but do be aware to catch them if they look like falling! Next time mine will be getting screened as soon as they pop their shell!