I don't mind standing by it. A lot of times you DO have a good angle on a trouble ball coming in from A, and 99/100 times not seeing touch when something funny is happening regarding tha ball at the almost exact same time you will miss nothing.
If 2-man all we ever really do is compromise looks for one reason or another and I don't see this as any different.
IF sh*t hits fan with the BR coming around first, AND a coach sees it, AND it ends up mattering, AND he comes out to ask what I saw- I am 1000% sure I can talk my way out of it by explaining my rational for not looking at the touch but rather the teouble catch/no catch. If HC has a problem with it, well he can either build a bridge and get over it or, not. I could care less.
Now, would I teach this to a group of LL umpires? Not sure because I have never worked with that level of umpire, but usually I assume when we talk mechanics here on UE we can go beyond the basics, since most who take the time to read these posts know the basics at this point and want to discuss nuances in order to get opinion from people they trust so they can improve.
Of course MST is entitled to disagree, and that is cool with me!