New IOTA wallet v2.5.5 has been released two hours ago. It promises to make some improvements. To get full information read the Github documentation.
https://github.com/iotaledger/wallet/releasesFrom the slack channel:
This new wallet introduces some major changes, such as moving away from Reattachements, to Transaction Promotion, which after further analysis, has proven to significantly increase transaction confirmations and the Tangle reliability.