When Cell C tried to call 3G-HSPA 4G, the issue was as much about what customers would understand with the new term and it was clear non-tech-savvy peeps would automatically assume 4G is better than the 3G networks available at the time. Basically consumers would be misled. They'd get exactly what they were getting as '3G' but would believe it's '4G'.
This was a strong view the ASA took on the matter.
There are no LTE or 4G networks active in SA today, so as long as all operators call LTE 4G, consumers will not be misled by any of the operators.
So the short answer is that everyone should call it it LTE and if one wants to call it 4G, everybody should, i.e. a level playing field for all.
The real problem is the device manufacturers though. I saw a number of LTE devices branded as 4G, so how do we manage this? Won't help much if we say it should not be 4G but every second modem is labelled 4G.
Before we get into the mess the US got into, I believe there should be consensus in the industry.
Call it 4000G, for all I care, but keep in uniform.