If you have submitted, will not be influenced.
For the time being nothing changes because there is only a governmental announcement but not a new regulation about that.
First of all, the announcement of the increase of the 250K limit of the Greek program to 500K is currently an announcement by the Prime Minister, the application and parameters of which will be determined within the next days by the competent ministries. However, in any case, legal amendments that are about to apply do not have a retroactive effect if your application has already been submitted. There is no reason to worry.