Tight clusters of red portals with a few short links would be fun, the problem is that they currently spam out LONG links in every direction, and large numbers of those.
Many towns are crisscrossed with links more than 2.5 km in length, and even after clearing out machina from a park to play in, the field is still covered in links from far distant portals. It's not uncommon to find portals with 24 links that spider out in all directions to the far corners of town, requiring long drives to take out single portals one at a time.
I'm seeing 7+km links
Just took my semi monthly (3 weeks this time) drive to one of the two infections I have access to. Left it with 5 portals last time, took out 54 portals 3 weeks later. Left 6 or maybe 7 portals. Now I wait another 3 weeks...