I'm probably further from a guru than you are put here's my take on this and I'm sure someone more knowledgeable than I will correct any of my misunderstandings.
I've been finding that people generally don't want to do a lot of maintenance on their vehicles and the cooling system is probably the most neglected part of a vehicle. ELC is Extended Life Coolant and EC-1 is the designation a coolant gets after passing the EC-1 testing so they are the same thing.
This is from the pdf you linked;
"Gelling of oil happens when an excessive amount of coolant has leaked into the oil compartment. This gelling phenomenon becomes worse when large amounts of coolant and higher amounts of solids are mixed with the oil. When large amounts of coolant are quickly leaked into the oil, a gel will form. This is not related to ELC but to the volume of glycol and water contaminating the system. With a high amount of dissolved solids in the coolant, the gel will become thicker and heavier regardless of the type of coolant used. ELC does not have the solids found in traditional coolants. If a cooling system was switched from standard coolant to ELC, there could be a higher amount of solids than are normally seen dueb to carry over contamination."
Gelling is not because of the ELC it's because of the glycol and water mixing with oil, ELC or Ford Gold or anything else, glycol and water is coolant (I hope I'm right here
) If LARGE amounts of coolant enter the oil gel forms (in the pdf) a ruptured EGR cooler will put that large amount in the oil for you (I don't see any other way this will happen). So the gel issue isn't really an issue, there is a bigger problem that causes the gel (the coolant leak). The CAT ELC is silicate free so doesn't have the solids the Ford Gold has. That means that IF the coolant contaminates the oil the result will be thinner lighter gel (although this still is not good).
As for maintaining the coolant, checking the freeze point, topping off the coolant and a litmus test (although the pdf states eh CAT ELC doesn't need this) is something you should do with ANY coolant not just the ELC. Spring and fall, check the coolant, make sure it's in good shape and it won't cause you any problems.
That's my novice