in the end, you don't *have* to make the connections in any specific manner.
soldered w/ shrink wrap is much better than twisted together and electrical taped, but for a very small investment in tools and technique, you can have an even better connection that is less likely to fail or corrode.
In your shoes, I wouldn't replace the recently connected vhf. But I might start looking at older connections to see if it is time to fix those.
I'm a big fan of fixing the worst things first, then when the worst things are all gone, moving onto the new worst... and so on until everything is as you want it.