St Albans, Ginifer and Williams Landing all have ramps. The LRXA website for Reservoir only mentions "lifts and stairs", not ramps. No ramp is shown in the image. So again, is this an omission from the press release or from the design?
Someone on Twitter points out that Reservoir will be an interchange station with the suburban rail loop. There should at least be provision for an escalator (by way of a suitably sized gap in the platform) to save the enormous costs of retrofitting one.
The "broken escalator" issues at Southern Cross and West Melbourne are issues of ordering a suitable grade of escalator and maintenance contract. Marcus Wong has a good post on this. The escalators on the City Loop don't seem to have the same problems, presumably because they purchased transit grade of a good brand and have a good maintenance contract.
DDA class ramps are difficult to fit on an elevated island platform. Lifts are a requirement as accessibility for those who can't use the stairs. And stairs enable most people access to the platforms, they'll be made wide enough to allow efficient output.
Escalators are an extra bonus, they are not a neccessity to every busy station on the network.
Yes they are used in underground stations, because they are more deeper and harder to access without them.
But surprisingly stairs have more capacity than a escalator, and an escalator doesn't provide an extra alternative for the disabled. Escalators are used more often used when you need to go up a few levels in a building, or provide an easier way in/out the station (especially deep stations). But you don't see them being added on every station because the costs outweigh the benefits.
Someone on Twitter points out that Reservoir will be an interchange station with the suburban rail loop. In fine print by 2032, in other words Reservior station is 12 years old. Also you wouldn't need to retrofit it, since the elevated station is seperate from the underground one. That is if the SRL is built to completion, which is still in doubt. Only 2 sections are guaranteed.
Broken escalator issues are because they didn't expect such a growth in demand at those station, so they built cheap ones. Mind you, they are inner city stations. It's common to find lifts not working, hence why they put a ramp or a second lift. Do you think adding a transit grade escalator is cheap?
Would be better providing more second entrances to existing stations which has already been happening at some stations. This is more of priority than escalators.
Wider entrances, more entrances & better DDA access. Escalators are just a cherry on top, they're usage is limited cause they are only benefitial to deeper station or the inner city stations where demand is really high enough to warrant they're usage.