Whether we have redesigned what offside is, is a moot point. We have certainly redesigned how it is applied.
Ten years ago, the Flemming goal would have been a totally uncontroversial good goal because the players were level. Changing the rule so that level was onside was one of the few universally approved law changes, because it reduced offside and brought about more goals.
Then along comes some bright spark who says that if we (1) introduce delays of game of up to five minutes; and (2) ensure that linesmen can't judge offside so play has to go on even if it's all for nothing; (3) ensure that goal celebrations will be either muted or wasted because people won't know until the following kick-off whether a goal has been scored; then we will be able to disallow some of these goals that people enjoy.
How is that good for the game of football? People who like football, like goals, like celebrating are all disadvantages. People who like watching a blank screen for 8 minutes in a game are pleased. Why is that good?
(1) Yes it's daft how sometimes it can take so long as the semi automated stuff should really speed it up so it should be a quick decision yet this season it hasn't been working as quick as expected.
(2) Playing on means goals can now be scored and officials can argue the toss about the offside after. In the past the linesman flagging instantly would first wind the crowd up by stopping a potential goal from being scored, more so when it was shown to be clearly onside. Who knows how many goals or class moves have been stopped prematurely. It's happened a few times now when a linesman has flagged offside after a goal is scored, only for it to be shown onside.
Even after a goal, there's less offsides then flagged by the linesman. They do this as they don't want to kill the celebration incorrectly when it's not a clear offside as the human eye simply can't get it right all the time when it's close. By the linesman not flagging, it also takes away the vitriol of the crowd as it's then directed at VAR and the offside lines tech for ruling a goal out. It also takes away the doubt of any 'favouritism' with mistakes as the margin of error is a few inches now, it's never a foot or a yard error like the past.
(3) This is a myth IMO as fans still go mental in all games when a goal is scored no matter what. They groan when VAR appears but then get to cheer again when confirmed or if not then the opposition get to celebrate instead. Think Sheff Utd's 2nd goal in the playoffs for example.
If people accepted that there is a small margin of error with offside as it's impossible to freeze that trillisecond in time the ball is player, butt they knew about the advantage given to the attacker adding a grey area in their favour then what is the problem if offsides that are shown are within the laws of the game? Certain fans moaned when a Leeds player was given onside, even though it looked offside, as they did with the Bruno goal against Man City (usually opposition fans) and they moan when it's the other way around as some of it is down to bias and it's to be expected.
Offside using VAR is never going away because of the variation and larger margin of error in the past when using humans only. They're trialling the daylight rule in Canada in April but IMO that won't work and won't be brought in. It will end up a farce with attackers with their upper body goal side of a defender can simply block the defender from defending, all while the attacker has a trailing leg keeping him onside. They did actually look at torso only but there was opposition to it.
Before the Ifab meeting it was expected that the trials of "daylight" offside would be ditched in favour of "torso" offside, which ignores arms and feet when making a judgement. However, there was opposition to this idea and it is now unlikely to go to trials.
What they could do is allow a slightly bigger advantage to the attacker, rather than the current 5cm or so that it is. That means an attacker can't stand goal side like they could with the daylight rule but when it's a close decision he'll always get a decent advantage.