You might be pushing uphill to persuade the developers to change the basic design since this has already been patented. However, I recently also requested the same feature here:
Left and right jump gates would also aid separation of jump thoughts, which now are all crammed against the left side in Normal view. Now that we can turn off sibling display there is no reason not to take advantage of the extra space available. (In Expanded view, the jump gate can jump to the right side of the thought when necessary, so this is a step in the right direction.)
So if you like my suggestion, please vote for it here:
Others have requested two jump gates per thought too; searching the forum should bring up earlier posts.
As far as I know, no one's really thought this request through. If you press F8 to create a new jump, how would PB know which jump gate to link it to? And if the active thought had a lot of siblings, how would you prevent them from clashing with any jump thoughts linked on the right? It could get very messy. For this idea to work, "Show siblings" would have to be unchecked. What would happen in Expanded View if we had two jump gates? When a thought is moved to the left of the plex and has jump thoughts to its right, the jump gate already changes to the right side automatically, so the thoughts that were supposed to be linked to jump-left and those to jump-right are going to be hopelessly mixed up; they would all end up on one side or the other of the active thought...
Would we drop the current, patented parent-child-jump hierarchy for twin parent/child, left jump/right jump hierarchies? There is currently no hierarchy in jump links, which were never designed for this purpose, only to designate "remotely related" links. Also note that two thoughts can only be connected by one link. Would this mean that now it might be possible to connect thought A to thought B by both a left and a right jump link??
Too many unresolved issues for my liking, even though I did suggest it! This is a good idea but the design needs a bit more work.
On the other hand, you don't really need a jump on the right side to create a fourth dimension at all. See this thought-provoking article: