old 3.0 tp was 12cd starting on placement (really important here, with 10s duration.
so the difference can be visually seen here:
obvs now infinite tp has a 10s cd rather than 12s, but the effect shown in the above diagram is still there, i.e. 10s guaranteed chunk of hero down time minimum (because tp is basically the tool that enables sym to have uptime), which is very detrimental to sym which old tp wouldn’t have.
and you can imagine how hard it is to keep tp in valuable locations that move frequently (esp post shield nerfs) when there’s like a 10s buffer to move tp.