No... No, no, no...
I disagree entirely sorry if this is offtopic but I think if you can transform the trade nodes places thingys into regions with ports then this would be far better than those stupid yellow nodes, and to cover the use of trade ships (which isnt much) some lovely modder could make so that you 1st need to send a trade ship from home/trade place - to - trade place/home, before you can receive an income from the new region..
Either that or just hav it function as an extrmely valuable region with limited development capabilities like some already present in the carribean for example..