I don't think Alex was the weak link at all and in fact for years I thought he was the most underrated guitarist in rock. His chord phrasings and his use of tone was IMO ground-breaking. I could give examples of many songs where Alex's playing shines easily as much as NP and GL but suffice to say that there would be no Rush without Alex (and yes I include all three players in that statement).
Rush had no weak link. Now, I think it does go without saying that Alex was not as highly regarded by the general public, for lack of a better term, on his instrument as the other two (Neil is often call the greatest rock drummer ever or 2nd or 3rd best at worst, and Geddy is usually in the top tier of all-time bassists, while Alex is never in the top tier of guitarists with Hendrix, Page, EVH, Gilmour, Clapton, etc.), but being the least best of those three does not make you a weak link, as being weak implies that your deficiencies held the band back in some way, and that was never the case with Rush.
I completely agree! Alex never really got the respect he deserved until around GUP when he was named Rock Guitarist of the Year by GP magazine. He was always tinkering with his technique and sound and starting with Signals his guitar was taking a backseat to the keyboards up until Counterparts. He complained about it but he was a good foot soldier during that period and adjusted. When Rush made there return after the tragedies that Neil went through, the entire band experienced a renaissance where young kids discovered them and a whole new demographic was following them - women. Whenever we would follow them on tour, half of the meetups were female and not because of their boyfriends or hubbies but because they truly enjoyed the band.
But you know who hasn't had that kind of renaissance, Clapton, EVH or even Ritchie Blackmore? Those guitarists wrote iconic songs but they were never as versatile as Alex. Click below to find out.
https://www.youtube.com/watch?v=luazBVOYa9c
PS - My opinions come not from the fan in me but just how things have turned over a span of time.
Look, I get opinions, you can like or not like his playing, but to say that Blackmore isn't "versatile" is just unfounded. It's not supported by the facts. He's got hundreds of sessions under his belt, playing everything from blues, to country, to pop, to rock, to prog. With Deep Purple, he went from 60's psychedelia to 50's rock to 70's hard rock to proto-metal, to funk, to blues. With Rainbow, from blues, to folk, to rock to prog, to proto-metal, to pop. With Blackmore's Night, folk, country, blues, classical (and multiple eras of classical)...
I'm a FAN of Lifeson; he's a particular favorite of mine, but there's no need to undermine Blackmore to defend him.