I had gotten so bored from waiting HTC 's unknown update and rooted my Desire Z a month ago, tried some Sense 3.0 and 3.5 ROMs, and can easily say that Sense 3.0 is not worth waiting. Because it lags so much (that is normal because it even lags on Sensation), seems un-optimized and includes lots of bugs. But Sense 3.5... It is seriously amazing! Faster, fully-optimized, includes more features...
But I am %99 sure that HTC won't give a Sense 3.5 update, just because they are giving Desire Z an update later than others doesn't mean they are working for something special, Desire Z has landscape mode, that is why it gets updated later, remember the Gingerbread update. So we should only expect a full Sense 3.0 with Android 2.3.5, or just a new lockscreen with Android 2.3.5 update, expecting anything else will only cause disappointments. And I am writing this post to suggest anyone who doesn't happy with Sense 2.1 to root his or her phone, waiting is just gives pain
But I am %99 sure that HTC won't give a Sense 3.5 update, just because they are giving Desire Z an update later than others doesn't mean they are working for something special, Desire Z has landscape mode, that is why it gets updated later, remember the Gingerbread update. So we should only expect a full Sense 3.0 with Android 2.3.5, or just a new lockscreen with Android 2.3.5 update, expecting anything else will only cause disappointments. And I am writing this post to suggest anyone who doesn't happy with Sense 2.1 to root his or her phone, waiting is just gives pain