Romo was running for his life most of his career behind terrible lines. Not all, most.
Holding the ball too long was never a complaint I had with Romo, nor do I remember anyone else mentioning it.
Oh, we mentioned it alright...which is why he also fumbled too much in the pocket (like Dak), and in many games took too many sacks ("just throw the ball away, Tony, just throw it away!").
So when Dak makes Read 1 and they're covered, and then Read 2, and they're covered, his next action is how he's been coached....which in many games, to avoid fumbles and sacks, he's told to just dump it off to Zeke no matter where he is (Zeke could be 5 yards behind the LOS). Running is risky business....could be fruitful, could be disastrous (sack! fumble! argh!). The Cowboys relied on Romo's escapability in the passing game too much, and it finally caught up to the Cowboys, ending his career.
For Dak, he'll have to rely on Read 1 and Read 2 more frequently, and make sure his players get open...else look for a TE hook for 3 yards or whatever, just to avoid a loss. The problem is...the current TEs aren't open all the time, so then Dak has no choice other than find Zeke, or step up and take off.
If it was easy, and consistent, there would be a lot of QBs having massive success consistently, week in week out. Actually, there's very few...and even QBs who won the Superbowl struggle, in consecutive games (yes, even A Rod, Brady, Roeth, Brees and Ryan...let alone others like Carr, Mariota, Stafford and others). Hec, look how much they paid Cousins, and he's not having much consistent success either (some games solid, some games putrid). And these are seasoned QBs.
So with Dak, we need a little patience. Hec, if he wins the NFCE AGAIN this year, that's a success. If he can make a playoff run and win a game or 2, hallelulah!....then they're definitely on the right track.