Old kit lens, new kit lens or a pro zoom?

I have the 14-42 R II, came with an E-PL6 that I converted to IR; haven't used it, may never.

I have the 14-42 EZ, got it to make an E-M5 pocketable.  I don't like the power zoom control.  Unlike the 12-50, it is a toggle type (you twist the zoom ring to engage the power zoom and hold it until it goes past where you want it, then twist it back the other way quickly a couple of times to nudge it back until it goes past where you want it, and so on.  With the 12-50 (and 45-175), you turn the zoom ring like a normal mechanical zoom and stop where you want...done.  At any rate, I use the lens rarely.

Basically, I am not a fan of kit lenses; they are slow with limited range.  I do have the full range zooms (Panasonic 14-140 I and II, Olympus 14-150 II).  My wife uses the 14-140 I, but it's bigger and heavier than the 14-140 II.  I like the mark II versions of these lenses, especially the Olympus because it is sealed.  I usually recommend getting one of those and a prime of choice for low light interior.

I use the faster zooms most of the time.  Probable the 12-40 f/2.8 the most, although the Pansonic 12-35 pairs well with the Panasonic 35-100 (they both take 58mm filters).

I do like the 12-60 range (I had the Zuiko 12-60, and use frequently the Nikon 24-120).  But the kit version is slow, and the new one is not much faster and a lot more expensive.

If you mostly shoot outdoors, get the full range zoom.  Add a fast prime (I like the 17mm f/1.8) for low light shots in or out.

If you shoot a lot indoors, get the faster PRO zoom.

For me, I like to have the PRO wide angle zoom, plus an ultra wide (9-18 is very small), full range (14-150 II is my choice now), plus the 17mm f/1.8.  I'll add the 45 f/1.8 if I plan to shoot concerts/theater/dance.  That kit fits in a very small bag, great for travel.  Most shots are with the PRO wide angle zoom.