you have many options...

trichs usually change (for the most part) all together. my advice is to take a smallish popcorn bud, dry it in the oven @ 200 or lower until its fairly crispy. smoke it (ignore the chloryphyll taste), and see how you like the effects. if you're happy, you know what to do.

you also could harvest the top 1/3 of one and then reveg into a mother, or allow it to flower longer and let the lower colas develop more.

or, you could do your bonsai idea. trimming roots can be fun.

i'd leave the one in the 1st set of pics alone for a while though, but its your call. sample them all!

on a side note, the second set of pics i saw deep dark green leaves. probably due to the nute thing we posted about earlier (full of nitrogen). you'll definitely wanna flush those for a week or so to eliminate that funky chemical smell and taste.

keep on rockin', 'shake!
-GG84