The author is certainly melodramatic in the writing but the gist of it is that Jiyeon is doing well and that's good for T-ARA.
If T-ARA did the same thing they've always done musically, us fans would be happy but everyone else might not be so interested.
Jiyeon is doing something completely new and people are interested, many of whom probably haven't listened to T-ARA in 2 years.
On top of that, now people want to see what Hyomin can do in her solo debut. Eunjung also has her movie coming in the summer.
Eunjung in an interview with the Gossip Girls release mentioned there were plans for T-ARA Korean activities so following successful solo promotions, a T-ARA release stands to be very well received. This is very good news for T-ARA and Queens.