Aside from the new Omni and a horn, there are not many big changes lined up for ST2S in 2018. With that in mind, the aforementioned price reduction seems like a great deal! If the bike is equipped with the old version of the Omni, you may want to look into upgrading and swapping out the old Omni for the new one. I believe Stromer may be offering a discount on the new Omni to customers with newly purchased bikes equipped with the old version. I certainly recommend the upgrade.
FYI, the MSRP of the ST2S is due to change from $10,000 to $9,000 for 2018.