In my opinion...
Here are some phrases to help you express you point of view…
Conversation in an office
Ingrid: Well, Jonathan, I've looked at your presentation for tomorrow and it goes a long way towards outlining our current situation, but I just feel that on some issues it misses the mark.
Jonathan: Which issues do you mean?
Ingrid: I think your argument about targets is flawed - it doesn't take into account the competition. And I'm afraid I can't agree with your ideas on restructuring.
Jonathan: But I thought you would be right behind me if I made radical suggestions.
Ingrid: Don't get me wrong, I think you've made a fantastic contribution to this operation. Quite frankly, the changes you've set in motion were long overdue. It's just that your vision for the team isn't quite what I had in mind. I wholeheartedly agree with your analysis of where we're going wrong at the moment, but I'm not convinced by your solutions.
Jonathan: So, my presentation doesn't come up to your expectations?
Ingrid: No, that's not what I'm saying at all. You know that I really value your input. Your presentation just needs some fine-tuning. Also - I'd like to suggest that you finish by asking for a show of hands.
Jonathan: To see who agrees with my ideas?
Ingrid: No, to decide what sort of biscuits to have with our tea afterwards.
Conversation
Vocabulary and idioms
it goes a long way towards... = vous êtes sur la bonne voie
I feel that... = à mon avis
it misses the mark = ça tombe à côté
a flawed argument = un argument erroné
I can't agree with your ideas = je ne partage pas votre point de vue
be right behind somebody = soutenir quelqu’un
don't get me wrong = comprenez-moi bien
make a fantastic contribution = faire une contribution formidable
quite frankly = franchement
isn't quite what I had in mind = ce n'est pas exactement ce que j'ai en tête
I wholeheartedly agree = je suis entièrement d'accord
where we're going wrong = là où nous nous trompons
to corne up to someone's expectations = répondre aux espérances de quelqu’un
that's not what I’m saying = ce n'est pas ce que je dis
I really value your input = votre avis m'importe beaucoup
fine-tuning = réglage minutieux
l'd like to suggest that... = je voudrais proposer que…
ask for a show of hands = demander aux gens de voter à main levée
More opinion idioms
Neutral
constructive criticism = critique constructive
critique = critique (« criticism » est plus négatif)
feedback = feedback
have you thought about...? = avez-vous considéré... ?
let's agree to disagree = acceptons que chacun reste sur ses positions
there is something to be said for it = ça se defend
Positive
do something to the best of one's ability = faire de son mieux
l'm impressed = je suis impressionné
outstanding = exceptionnel
praise = (n) éloges ; (vb) faire l'éloge de
strength = force
that's right = c'est juste
this is very impressive = c'est vraiment exceptionnel
well done = très bien
you were great = tu as été sensationnel
Negative
criticize somebody = critiquer quelqu’un
his best isn't good enough = son maximum n'est pas suffisant
I agree with you up to a point = je suis d'accord avec vous jusqu'à un certain point
I disagree = je ne suis pas de cet avis/je ne suis pas d'accord
I wouldn't go as far as to say that = je n'irais pas jusque-là
I’m not impressed = ça me laisse froid
it is not his strong point = ce n'est pas son fort
pinpoint somebody's weaknesses = mettre le doigt sur les faiblesses de quelqu’un
that can't be right = ça ne peut pas être juste
there is room for improvement = cela pourrait être mieux