Never ever had any issues with clutch and side stand switch on any of my 7 DR650SE over the last eight years. Combined mileage of the bikes probably above 400 000 km with two bikes accounting for half that figure.
The side stand switch can cause a split second ignition cutoff on a hard landing after a jump. It's so short you will most probably not even notice it.
You can push start a DR650SE with the OEM safety switches as the side stand switch requires the bike to be in gear and side stand down to cut out. No need to push start with the side stand down

The clutch switch only prevents the starter to operate unless you pull the clutch.
Re the aux. power point: It's the connector for the park light inside the headlight reflector. Most markets bikes do not have the park light but have the connector to attach it on the wiring loom. It is switched and only has power when ignition is on (or on P if your ignition switch has this position). Will check for colour of wires and plug and edit later.
For a permanently connected aux. power point (for example for a Vapor) find the red (positive) and black with white marker (ground) leads on the green ignition switch connector under the tank and tap them.
For a switched positive you can also tap into the orange lead on the same connector.