Either make standard, or offer as an option a more powerful on-board charger than the 3.3kW. 3.3 kW is acceptable for overnight charging for commuting, but too slow for many short/no-notice trips immediately following deep discharges of the battery (say, if you have a long commute, but wish to go out shortly afterwards). In addition, unless and until the currently non-existent CCS quick chargers become common (and the option is available on the car), all trips away from home will use L2 charging.
3.3 kW only provides about 10-12 miles of freeway range per hour of charging on the Nissan Leaf, and should provide the same or a bit more on the Spark EV. But all the Spark EV's competitors now have a 6.6kW charger providing 20-24 miles of freeway range per hour of charge, either standard (Ford Focus Electric, Honda Fit EV, Fiat 500e, LEAF SV/SL) or as an option (LEAF S); only the Mitsubishi i-MiEV and the Smart ED just offer chargers of 3.3 kW or less, and they fall short of the SparkEV in range, passenger capacity or both.
While I understand the desire to keep costs down by using the same charger as the Volt does (for the Volt 3.3 kW is perfectly acceptable, as the ICE can handle short notice and out-of-town trips), 3.3 kW is just too limiting for many people given the actual state of the CCS quick charge infrastructure and what will undoubtedly be its slow growth away from metropolitan areas and transportation corridors. If the Spark EV only offers 3.3 kW charging, it will force many potential buyers who wish to use the car for more than short-distance commuting to one of the other competitors, for that reason alone.
Also, while the quick charging infrastructure remains limited and dedicated L2 EVSEs are still sparse, it would be an excellent idea to provide a portable EVSE with the car that allows both 120 and 208/240 volt charging. Many Leaf, Volt and other BEV owners have had their portable OEM EVSEs upgraded by evseupgrade.com to allow this, and others have built their own EVSEs. It's about time one of the OEM BEV manufacturers (other than Tesla) offered this capability from the start.