What limitations did you find with the tile?
Not to respond to Tile directly - they are fine and good as any - but overall, this is what I see after having tested 4 or 5 brands of BT Trackers - a fair number of them:
OH - the glaring one relates to anonymity and privacy, which is why NONE of the tracker companies have yet found a way to the huge theoretical market. Apple has to create the real market. Only Apple is positioned to create the market - because privacy.
Depending on where your item happens to be, there are no group sourced fellow customers who are allowing it to track your item. The usual "drains my phone battery" is perhaps the rumour that stops folks from running the Tile and TrackR stuff. This functionality is ideal to run in the OS - encrypted and anonymous and private.
However, across all the makers, I think battery life is STILL the big issue. You want a tiny tracker, but the battery lasts a month or so if you are lucky, and you lose your keys just after the tracker device battery is drained

. Seriously.
If try to use a dozen trackers for your bike, wallet, jacket, bag, TV remote etc etc. It will work as good as it can with the bad app interface - enough to find your item maybe. But a year forward and I would bet that most are dead batteries and the customer doesn't even care to replace the batteries on all of them. Maybe one or two essential ones you'll replace the battery for, but you really would have to be diligent to change a dozen batteries. I didn't, and I've even made stuff like this.
I was an early adopter for all this stuff, and perhaps advances have been made that I am not aware of. I think I saw TrackR or whatever said they had some New and Improved battery blah blah. It didn't really make a difference in my testing.
For a bicycle, it's worth it to have more than one tracker on board and change the batteries. But for my raincoat - blah - I put one in the pocket on a trip because I often forget my coat, and this one of course has a dead battery and I don't care enough to replace it right now.