But that'll also depend on the effectiveness of the DRS. If previously, overtaking was so difficult that it was more or less impossible, DRS has some times made it too easy. So take the Alonso-Hamilton fight in Hungary (and subsequent Ocon win). Had the DRS been slightly more effective then Hamilton would just have cruised by at first attempt.
With an effective enough DRS; it's almost as if they are racing ghost cars (to use a sim racing metaphor) rather than actually racing each other, as there's no possibility to defend your position. It's just as predictable as before, only then you knew that the faster driver wouldn't get through and now you know that he'll definitely get through.
I'm very glad you raised this point Rediscoveryx. I've noticed that quite often those opposed to DRS only focus on its effectiveness after they've witnessed and easy overtake (almost unequivocally caused by significant tyre offsets). Those same individuals tend to ignore the 20 plus laps of the first stint in that same race, where both cars were on similar tyres and the same strategy, with the chasing car a few tenths per lap quicker, but unable to even close to within one second and get DRS (e.g completely impossible to overtake).
The Alonso-Hamilton battle is the type of duel I'd like to see between cars where the pace difference between them is a quarter of a second or so. Most of us want to see drivers in machines of equal performance compete against one another, so for instance, Red Bull and Mercedes that are closely matched at the moment. Performance between them can vary by a quarter of a second depending on driver, circuit, qualification pace and race pace, however without a tyre offset strategy you can kiss goodbye to any on track battle between the two, because with just a quarter of a second pace advantage, it's highly unlikely the chasing car will be able to get within one second for DRS activation, let alone engage in wheel to wheel shenanigans. If the chasing car does manage to get DRS, they'll still be too far behind for it to be meaningful.
You mentioned the Alonso-Hamilton battle in Hungary. At that point Hamilton's tyre offset enabled him to lap around two seconds per lap quicker than Alonso, Hamilton also had DRS and these were the overwhelming circumstances necessary to give us a battle. To put this into perspective, Hamilton's Pole time was a 1:15.419 while Räikkönen in thirteenth managed a 1:17.564 in Q2, so the qualifying pace difference between them was about two seconds. Imagine this qualification pace advantage translated to race pace and it was one of those topsy-turvy races in which Hamilton found himself behind Räikkönen battling for position, with Verstappen the next car ahead. In this situation you're asking to have an intense battle between two cars in completely difference realms of Formula One.
The Mercedes is a tier 1, front running car, while the Alfa Romeo is a back of the grid car. You're seeking an intense, closely fought duel between an Alfa Romeo and a Mercedes and then an equally epic duel between a Mercedes and Red Bull. This simply isn't possible, because if DRS is catered towards competition between a front-runner and a back of the grid car, then it will be utterly ineffective between two front-runners. I've always said that DRS should be geared towards competition between similar cars, which would mean easier overtakes against cars lower down the field.
It should also be noted that easy overtakes isn't something new. In this turbo-hybrid era, significant tyre offsets are what cause easy passes, in the previous turbo era fuel offsets were used instead, with the faster car saving fuel, then turning up the boost for an easy pass. Prior to aero being so dominant, a good slipstream with a long enough straight lead to easy passes.