The more NATO moves into the southern east, the higher the likelihood that it will find itself being wrapped up in local wars and Islamic confrontations I do not see it prepared for, nor is western public. That Russia legitimately will be angry at such moves will not make the sitations any easier. Plus: these countries in that region - are far, far away from the northern Atlantic. How free to act NATO alrerady is we have seen during the Balkan wars. NATO is effectively a helping division nof wars that are fought by the US. Additonally, the US has no interest in an independent, capable european military or expedition force. The attempts of Europeans to create this, like the Euro brigade, may have been small enoiugh, nevertheless immediately triggered most robust pressure to put them under NATO command again . and NATO is dominated by the US without whom nothing goes - in good and in bad.
I am strictly against any further steps of NATO into the East. Else it sooner or later ends up guarding borders in the Kamchatka area.

Some people want to take a bite that is bigger than what they can chew.