To clarify, I'm not trying to get into some extremist anti-group-class rant here, unlike, ahem, some people historically have done.
He who should not be named ..............
There's absolutely a good place for group classes, especially when you're starting out, and with a good teacher (and a relatively small group), I think you can go a long way with them.
Yes you can progress this way but the caveat is as you state.
Just how does a beginner find a good teacher? Usually it's pot luck.
Previous dance experience helps because you have some sort of basis
to decide but that presupposes you have a choice of teachers.
And if you do accidentally find good teachers, and I did eventually, the weekly
(or more) deconstruction is not always helpful. More and more I lean to private,
or at least personal, lessons being best. Most people starting out in tango
aren't convinced enough to commit to that expense so perhaps it's an idea
to treat group classes as an introduction and progress sooner rather than later
to more personal tuition.
I just think that, to continue with the learning process, you probably need to evolve your own methods of learning, and that typically this will involve more of other elements than just group classes alone.
In my experience it was more or less no group classes at all.
At some stage you have to break away and decide for yourself.
And when you have that confidence then decisions about future
learning experiences are much easier.
Then as I regard Tango as the ultimate self-improvement dance,
maybe that's the way to go. Certainly much more practise and
actual dancing than formal teaching. The learning doesn't stop though.
It's your dance, it is you who has to self-develop it.