I don't think the Bloor line should go to Pearson. That's Eglinton's job (whether it be LRT or HRT)
I have to agree with you on this one. I've been doing some thinking, and Eglinton is the superior route to also go to Square One, simply because the BRT ROW is already there (or will be shortly). Upgrading that to LRT will be a snap, especially because by that point Ottawa will have already done it, so we'll know exactly what the kinks in the process were.
Personally though, I think the DRL should go to Pearson, not Eglinton. If you're extending the DRL West up to Eglinton anyway, might as well share the ROW with Eglinton and bring it to Pearson (that is of course assuming that Eglinton will be HRT).
I'm actually working on a semi-fantasy transit plan right now (I say semi-fantasy because it's very much a 25 year 'half of this probably won't get built plan'), but I'm designing it with an emphasis on alternatives to current or past proposals. The two big changes from most other plans are:
1) Separating the Y from the US at Union, and running the DRL East and US line as one line. Yonge will always have higher ridership numbers than either of those two, so running it as its own separate line allows for greater flexibility in terms of headways, etc. Similarly, the projected ridership of the DRL East and the current ridership of US are very similar, so it makes sense to pair them up, seeing as how their required headways will be nearly identical.
2) A 4-tracked LRT subway (yes, you're reading that right) under Queen St from Roncesvalles to just past Broadview. Hear me out on this one. One route does the current 501 route from Long Branch to Neville Park, using the local tracks on the tunnel. Another route starts at Dundas West, uses Roncesvalles to get down to Queen, and then uses the express tracks on Queen to just past Broadview, where it continues in the rail ROW to Victoria Park Stn.
The biggest dilemma with the DRL along Queen is speed vs accessibility. The DRL needs to be fast, but Queen needs local stop spacing. A 4 track provides this. And building it as a 4-track LRT negates any capacity concerns, as the capacity of the line will be higher than a double-tracked subway line. It also provides the advantage of running as a normal streetcar outside of the tunnel (ie along Queen East and Lakeshore West). The traffic delays occuring outside the tunnel will not impact the DRL component, as it rides purely on the express tracks. The express portion also extends north via the Georgetown corridor to Eglinton, where it shares that ROW through the Richview corridor, until it hits the 427. Eglinton LRT continues on to Square One, DRL goes to Pearson. And voila, an express train from Vic Park to Pearson, via downtown, with more than enough capacity to serve the projected ridership, and the flexibility of offering transferless rides.
Crazy, I know, but I'm trying to think outside the box here. I'll post the map in the fantasy thread when I'm done with it.