My first thought was that it is an antique Brunswick-Balke-Collender Wellington pool table as well. I have no doubt that at least the main body, frame, rails, and aprons are those of a Brunswick Wellington table.
Yes, there are subtle differences between your pool table and those you see in the old Brunswick catalogs, but remember - the photographs are typically of the 1st generation of a pool table model (and in some cases, a prototype). They iterated and improved upon models over time and some of those improvements never get photographed for the next catalogs, etc.
As you probably know, the Brunswick "Wellington" was manufactured from 1906 to 1911. The first iterations (1906) were built under 18 different construction patents awarded from 1892 to 1905. Those made in subsequent years would likely have incorporated various advancements in construction and design that weren't available in the initial release.
The ball return mechanism and it's ball tray could be an "extra" available on later models. There is also a chance it was purchased after-market and installed/retrofitted. Here's an ad from a 1910 Brunswick-Balke-Collender mail-order catalog showing what they call the "Patent Pool Trough Attachment". The fact they named it "attachment" tells me it was an "extra" available for purchase. It also lists the price, including installation, at $50 (That's about $1280 in today's dollars).
The part I'm having trouble with is the leg style. Your pool table has straight legs with no ornamental trim like most of the Brunswick Wellington pool tables seem to have. But, legs were commonly damaged in the pool rooms, etc. and were very often refurbished, rebuilt, or replaced with any other legs available. Here's a Brunswick Wellington billiard table with home-made replacement legs (and some additional artwork):
The problem is that you can't be sure what, if any, work was done to the pool table before your family came to own it.
Back in those days folks did all kinds of home-grown repairs to pool tables, like making one table out of several busted pool tables. We call them "Frankenstein Pool Tables". This could be the case with the ball return system as well.
Here's a "Frankenstein" Brunswick Wellington pool table with the legs and base of a 1890's Brunswick Monarch.
Another thing that stands out in the photos of your pool table is a section that looks to have been repaired near the leg. The wood grain is different near the corner. If the ball return system was indeed added after-market, perhaps some damage was done to that area when connecting it to the pocket, or perhaps a section had to be cut out to accommodate the ball return corridor from that particular pocket.
Also in this photo, we can see how the wood and the stain on the leg doesn't exactly match the rest of the pool table. This further supports the idea that some amount of work was done on this pool table at one time or another.
It sounds like you've done your research on the pool table so you likely already know most of what I've posted above, but hopefully some or all of it will be helpful to you in some way.
As to the question of whether or not to refurbish the pool table; it all depends on what your end goal is.
The Brunswick Wellington was a "simpler" model. Less detail than some others, so even in fully restored condition, they don't command as much as the slightly older and more intricate marquetry-laden pool tables.
If it were my pool table, and my intention was to keep it, use it, and pass it down further in the years to come, I would most certainly undertake a restoration to bring it back to as close to it's original state as possible.
Either way, it's a great looking pool table and a great piece of history to have had in your family for all those years!