[woodcote]

Go digital - then it doesn't matter  

Or rather, it doesn't matter quite as much - you still don't want one lane to be much easier/quicker, then it gets really hard to overtake. A good digital layout is all about overtaking opportunities.

Without an overpass, I think some variation on Catalunya works well for analogue or digital racing: slotracer.online/plan/f1-2018/barcelona

Ultimately, it all depends on how exactly you'll be racing on your track and what you want from it.

You might adjust racing formats to suit the quirks of a layout. If you race on both lanes to determine the race result, make it all about how close you finish on the trickier lane (ie. time difference if you race a set number of laps or distance apart if you race for a set time). I quite like not having a dropped score on a 4 or 6 lane club track - then the result rewards the driver who drives the worst lane the best.