On live TL can be camped.

On PTR it can be camped AND it can be destroyed.

The problem is how can Sombra predict when it will be destroyed?

If she places the TL in the same spots she does on live, they will generally be in sneaky, less traversed areas, often on high grounds. There’s going to be situations now where it will be destroyed unexpectedly and Sombra’s TL will suddenly be on cooldown, if the player playing Sombra even notices.

There’s now also the potential for TL to be destroyed when it is used as a mid-fight mobility tool, which all high level (plat and above) Sombra’s use it for almost exclusively sometimes. Because if Sombra doesn’t instantly use it after throwing it, it can be destroyed, even by stray fire not intended for it. And we’re not talking about a direct rocket or anything, even a sneeze will destroy it. And of course, because of those facts, Sombra players will be pressured to use it immediately unnecessarily to try and avoid this situation from playing out.

In my experience as a Sombra player with several hundred hours on her in plat and diamond, I can tell you there are many times Sombra get’s caught (usually by a DPS player or DVA/Monkey) and sometimes I’ll play a game of ‘go fetch’ with them. I throw the TL behind them, hoping they either turn around or chase it.

Believe it or not, once in a while they’ll commit an ability to chase it! This really shines when it’s a monkey jumping at it (6 second cooldown) or Genji dashing at it. Or sometimes they’ll be unsure, then they’ll come at me, and THEN I’ll use it. Because maybe I’m trying to buy myself some time, stay near the fight, and ultimately try to have an impact. Maybe I’m close to EMP. Maybe I’m waiting and hoping for something to change near where I threw the TL that will make it a more opportune time for me to use it.

As you can see, there is a HUGE world of difference between Tracer recall and a blink every what… 1 second? And you can store 3?

Versus Sombra’s one easily destroyable escape that goes on a 4 second cooldown.