Listen to quality drum VSTs (Or hardware) that have humanize features inbuilt (Round Robin is probably the most common) and you will be amazed at the difference it makes without having to change rhythm every 2 bars.
The next biggest improvement to an arranger (Some would say it’s the first) is to add a set of bass pedals and learn to play them yourself, as arranger bass really sucks in comparison. (It also shows the audience you are playing rather than just looking like a karaoke keyboard player)
Most of all, if you are a live player, then make sure you always enjoy yourself while playing, as otherwise the audience will just loose interest.
Bill