Keir[1] is still pushing (more than his opposite number) Workers Rights, funded services and rich-taxes[3], it's not like he's Total Tory like some would say.
"Dissapointingly realistic", perhaps, for the more radical left of the "nationalise everything, bleed the rich dry, state-funded everything for everyone else" type. Of course the balance of underpromising (with the hope of overdelivering) might not help him defeat the more populist promises from the types who go the other way by default.
But it's a long way to the likely election. Like tyre-changing strategies in F1, no doubt everyone's working to what
they think is the best pacing (or the worst in respect of their opponents) when it comes to making radical announcements or just coasting a bit to not fly off at a curve. (With an eye on whether adverse weather wets the course, or the sudden change of circumstances that puts into effect the restrictions/opportunities of having the Safety Car sent out for some unpredictable reason. To over-extend the analogy.)
The chances are even not that unreasonable that it won't be Starmer pitted against Sunak. Without making any predictions about which one (if not both) ends up irrelevent. Far more fun to consider that than to dive too deeply into the waxes and wanings of the currently assumed preparations for battle.
[1] Leader Keir, not "Baby Of The House[2]" Keir, just elected.
[2] They keep on saying "Officially known as.." I'm fairly sure this is a relative neologism, but I don t care to check that.
[3] Fewer rich-exemptions, at least.