That depends on what you consider to be a benefit.
If you don't need these additional 768MB on your emmc it doesn't hurt to keep the stock swap partition anyway.
Changing between swap partitions via a cron essentially does what Estel's ereswap does if you set it up to automatically switch the partition, so it has the same pros and cons:
pro: You get a "fresh" swap every morning.
con: Each copy of the swap contents means another writing process on a fairly limited amount of flash cells, eventually decreasing the cell's lifetime. But I don't think that's an issue unless you intend to keep your N900 for a decade or so.