TL ; DR: Freeze the economy until Journey’s End is fully implemented and working on the server.
The 1.4 update is here, but as desync bugs are being squashed out and the server updates to the newer version, I recommend freezing, or at least slowing the economy until support is fully implemented for Journey’s End related content. The core reason behind this is because, while a user possesses EXP Efficiency, their DP drains in order to sustain it, and gaining more DP may be harder or become more annoying for 1.4 clients due to desyncs and related errors between server and clients/players.