I am a software engineer. This reads to me as if there is a non-trivial amount of work required in order to lift this limit, otherwise there would be no reason to delay implementing it now and providing a concrete announcement to reassure those GME shareholders who are concerned about losing out on possible substantial profits (regardless of whether or not people here believe it will occur, it is clearly a point of concern for many Freetrade users).
A change like this needs this change will need to be developed, tested, and ready for deployment to production. This may be an issue if the share price spikes parabolically - the whole opportunity may pass before this update can be rolled out.
Perhaps someone from Freetrade can confirm whether or not they have a contingency in place for shareholders if this happens (@Freetrade_Team?).