actually in this situation, could it mean other things?
like probably based on wild guessing...
soyeon's contract with them might be up soon and she doesn't seem to want any extension and that's why they are trying to bring in vocalists now to give them the exposure before she leaves and also to show that they can do without her? (in this way, soyeon complained both on variety show broadcasts and possibly internally too (since she's the leader now and it seems to me like she's very vocal when it comes to issues like these also), of the heavy workload and became "prideful & lazy" as labelled by KKS, and so expressed that she might not extend the contract. in order to punish such a "rebellious" act, KKS instead of bowing down to soyeon, decides to introduce 2 vocalists (we all know how good soyeon is at singing and that's why probably the trade-off here is 2 for 1) so that should she really leave, there are people to take over.)
from yesterday's twitter updates from hyomin where she posted a photo of them in 'catwoman' costumes, she questioned if they are able to be the 'infinity challenge' of the music industry, with eunjung and boram declaring their love for t-ara. could it mean that they already know drastic changes are gonna be made to their current direction and that's why they are cherishing the moments they have now? =(
this is again, let me reiterate that it's based on purely WILD GUESSES and there is NO MALICE towards any of the members at all (especially soyeon since she was mentioned so explicitly here [she's my favorite member btw]).