Re-open it as soon as possible with the original theming once all safety procedures have been carried out, in my opinion
While it may seem easy to just say "one off, let's just let people get back on", unfortunately, 'people' don't trust their safety with this ride any more.
Steps must be taken to ensure that the ride is entirely safe itself, with it's operating staff fully aware of how each procedure should be legally and safely carried out, and the correct protocol in these situations (instead of waiting for the on site medic to call 999)
I completely understand your point, and I agree that all safety checks need to be carried out, but this shouldn't take too long if done efficiently.
I agree however, I believe we are forgetting that a massive part if this is to do with Alton Towers public image. Even if done in the most safe and efficient way as possible, if done too quickly, to the public eye this will appear rushed, greedy and incredibly insensitive. As annoying as this is, it must be acknowledged as an obstacle. Going the wrong way about this good bring severe negativity to merlin public image.This, intern, will result in more potential financial losses.
I fully believe that the reason the closed other multiple car operations down is not just because they 'COULD' be unsafe, but because they need to show they are taking this situation VERY seriously. Despite this, the media have still jumped on the band wagon and stated outright that the other four roller coasters are 'substandard'. A perfect example of how carefully the reopening of these rides needs to be handled because it is an outrageous statement to claim that they are substandard.
The key to the smiler reopening is to find the balance between financial loss/public image restoration and financial gain. Already Alton Towers is begin to slip down in the news ratings, and in my Park flyover on 05/06/15, the smiler trains were indeed in the process of being removed (I am a pilot). This probably will mean the park reopening in the next few days or so, as we already know. The Smiler, however, needs to satisfy it's PR requirements, before reopening, which is bit more difficult to do than safety checks and system refurbishments. (especially considering the British publics slant on incidents like this)
As much as i believe that this really is a pain and wish the ride to open tomorrow, as the chances of another incident like this are severly low, I have to acknowledge that this is not going to be the case:-(.
If anything, however, we can cite Texts Giant as an example. When Rosa Esparza fell to her death on July 17th 2013, it took the park 2 months to reopen the ride despite a $1million lawsuit. This ride cost six flags $10million to build. Granted, they are alot larger than the merlin group, this can only help as Alton Towers are far less likely to want to loose their £18million attraction. It would be a much bigger relative blow to the finances. I also understand that there is a large gap between the USA and UK's 'Public take' on incidents like these and the Texas Giant did not actually 'crash', the fact is the Texas Giant incident involved the worst kind of outcome, death.
This is why I have no doubt that the ride will remain and re-open. It's just a matter of when, which is difficult to gauge atm.
Sorry for the essay! It's just my take on the current situation!